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  • Sterling - Miscellaneous 1
  • Sterling - Hollow Block - 6.8mm - Yellow
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  • Sterling - Hollow Block - 6.8mm - Yellow

Sterling Hollow Block - 6.8mm

$12.90 - $14.90

Free 2-Day Shipping on Orders Over $50 Order by 12/20*

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    • Yellow, 13.5in
    • Yellow, 19in

    35 Reviews



    Built from Sterling's RIT 900 cord, the Hollow Block 6.8mm x 13.5in is designed to function as a pre-sewn prusik or climb heist. Made with aramid fiber and sewn with Sterling's proprietary sewing pattern, this ultra-strong cord is designed to provide excellent griping power on climbing ropes with diameters of 7mm or larger.
    • Item #STE0040

    Tech Specs

    6.8 mm
    13 in
    16.4 kN
    Recommended Use
    climbing, rescue
    Manufacturer Warranty

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    safety measures

      I think that rappelling with an auto-block is a good idea.
      Lots of people feel the same way, and there are a myriad of applications for Sterling's cord/other similar loops - I find myself using an auto-block most on wandery descents that require a bit of searching, when I'm cleaning gear on rappel, and when I'm tired and feel like extra safety measures might protect me from any momentary lapses in attention/judgement.

      Essential Tool

      • Familiarity: I've put it through the wringer

      I used to carry prussik cords just on big climbs, but this thing is such a better alternative. It is durable, reliable, lightweight, and doesn't involve the big knots of using cordlette. It has worked great for both autoblocking rappels and prussiking up, and it is so lightweight I now take it on all my multipitch climbs.

      Crazy grip strength

      • Familiarity: I've put it through the wringer

      Lightweight and very handy. Easy to tie a prussik/autoblock/klemheist and I trust it more than traditional cordalette. If using on a double rope I would get the larger size.

      Super rugged

        I love the hollow block for its short compact and durable design. Hangs cleanly in a figure 9 knot on a caribeaner, works efficiently as a 3rd hand on single strand or double strand ropes, can wrap about 3 times as an autoblock, unties easily after heavy loads in klemheist, great for 3:1 tension , & can even use as a prussik. Heavy duty resistance to burning and wear an tear. Had one for several months now and i use it in all applications.. Its still going strong. must buy for the price its a great addition to any climbers rack

        Essential and Versatile

        • Familiarity: I've put it through the wringer

        The Hollow Block is an essential piece of gear that I use in many situations. I keep 2 on a locking carabiner along with a Petzl Tibloc and with this combination you can do a variety of self-rescue techniques. The Hollow Block grips rope of almost any diameter and its design makes it much easier to release than a normal cord prussik with a double fisherman's knot. This is my go to for setting up an autoblock as a backup while rappelling and is a key part of my crevasse rescue kit. I highly recommend them for anyone looking for a dedicated prussik cord.

        Great for rappelling with an autoblock

        • Familiarity: I've used it several times

        Love the 19" for setting up an autoblock on two ropes for rappelling. The shorter version works as well but it's a bit harder to setup and you may not be able to do more than 3 wraps.


        • Familiarity: I've used it several times

        You could make your own autoblock by forming a loop of cord with a double-fisherman's, but this loop is both much more convenient to work with (no bulky knot) and has just the right amount of stretch/spring for grip.

        Superb Backup

        • Familiarity: I've used it several times

        This is a great piece of gear for rappeling off sketchy overhangs and ice climbs. It gives you the piece of mind that if something ever happened, you're not gonna zip of the end of your lines.

        This thing will autoblock anything

          Honestly. Whatever you need this things got you. I use it as a back up for rappelling. The larger size works fine for both normal and extended rappel. That other guy isn't exaggerating about the pvc. Just tested on a wine bottle, also held extremely well.

          Why Not?

          • Familiarity: I've used it once or twice and have initial impressions

          I picked this up primarily for rapping off ice routes and ski descents, because I always feel a little antsy gripping skinny ropes with gloves on. It's a great backup, and I can see myself using it rock too, so I won't have to do the old rope-around-the-leg trick when freeing stuck gear.

          Essential piece of kit

          • Familiarity: I've put it through the wringer

          This lives on a locker at the back of my harness. It's a backup on every rappel and has largely replaced the prusik cords I've used in the past. Superior grip even on iced up ropes yet easy to manage on the descent. I lent mine to a ski buddy who didn't have a backup (hence the non-hollow block in the video) and they're sold on it.


          • Familiarity: I've put it through the wringer

          Such a great piece for an autoblock or third hand. Length is great, works with a variety of rope sizes (I have ropes from 7.5-10) and no issues. With a piece of cord, I have found that the knot can be big and cumbersome when tying an autoblock, but with this it is more streamlined. Try one out, you won't be disappointed.


          A must-have!

          • Familiarity: I've used it several times

          If you're a climber and looking to rappel (this applies to canyoneering too!), then you'll want this on your harness before you step over the edge. If you set these up as you're third hand, you can rappel with peace of mind. They are very, very grippy, so that can be both a blessing and a curse. If you're attached to the yellow color, don't be because these will quickly become brown from use. That is only aesthetic though, but just a forewarning!

          Pretty nice tool

          • Familiarity: I've used it once or twice and have initial impressions

          I've only used a hollow block a few times. But it is a very interesting way to descend from a climb. After tying a prusik on your brake hand end of the rope and you've attached it to yourself you're good to go. It acts as an auto lock on your repel, which enables you to clean gear and take both hands off the rope (sketchy!) or fix the rope that's been tied into a mess. It's a inexpensive piece of gear but can make a tough repel easier with a little peace of mind. I'd recommend this to any climber, or canyoneerer looking to up their safety.

          Question: Is the size (13.5 or 19) the "circumference", the length before it was sewn, or something else? thx


          That'll be the length when laid flat. I've got the 13.5 inch version and it's 13.5 inches from end to end.


          Feel free to contact me with questions on this product or any other climbing gear!

          Is this the 13.5" or the 19"? The description says 13.5", the style/size dropdown says 19".

          You can choose either size, in the drop down menu.

          If it's not giving you both options, there is either a technically difficulty, or we have sold out of one size. At this moment, we have plenty of both sizes.

          Questions? Reach me directly at:

          Emily Jenson

          Expert Gearhead