The Bontrager Pro Speed Box offers extra storage on your bike without adding bulk. With the Bontrager Por Speed box, you can keep ride essentials like food, tubes, and gels conveniently and securely on your bike. Features: Mesh cover to keeps items securely inside Provides quick access to smaller essentials Attaches via a single neoprene/Velcro strap and a shock cord Mounts directly behind stem keeping it out of the wind Zippered main compartment and two external pockets Specs: Capacity: 28 cubic inches Dimensions: 11.5 cm L x 6.4 cm W x 7.5 cm H