It's a special gel tape about 2mm thick with an adhesive

Pockets Position and Quantity: Zippered hand pocket on left hip and phone pocket on lower right hamstring area

CNC machined aluminum provides strength and durability

Spindle Material: Forged SCM 435 Chromoly steel

Chainring Material: Steel

BOX Two Quick Release Seat Clamp - 31.8mm - Black algolia-ignore It's a special gel tapeThe BOX Two Quick Release Seat Clamp is a top quality seat post clamp that is made from a cold forged and CNC machined 6061 T6 aluminium. This makes them super light but also strong and secure. The quick release head has a low friction surface that gives that smooth lever action. Specs: Material6061 T6 Aluminum Weight27 grams (31. 8mm), 28 grams (34. 9mm)