Sleek Aero Design Ideal for Gravel / MTB Use Narrow Width Direct-Mount Base for Compatible Frames Multi-Hole Base for Increased Adjustability on Frame Optional Heat-Welded Velcro Strap Loop-Holes ( 3 Straps Supplied ) Waterproof Material Full-Length Zipper for Easy Access Zipper Hood for Clean Design and Zipper Storage Easy to Clean 64mm Bolt-Hole Spacing ( same as Bottle-Cage Standard ) Material : 600D with TPU Size : 210 x 57 x 75mm ( 64mm bolt-hole spacing )