How long is the extension handle?

Tech Specs:

Material:

600D Polyester 

Volume:

[90] 5500cu in (90L); [120] 7300cu in (120L) 

Dimensions:

[90] 29 x 15 x 10in (74 x 38 x 25cm); [120] 31 x 17 x 12in (79 x 43 x 31cm) 

Pockets:

1 Top, 1 front 

Padded:

No 

Wheel Type:

Urethane 

Weight:

[90] 8lb 8oz (3900g); [120] 9lb 8oz (4300g) 

Recommended Use:

Traveling with a lot of gear 

Manufacturer Warranty:

Lifetime 

Country of Origin:

China