The most compact, aerodynamic top tube fuel box minimizes wind drag while eliminating interference with legs. Mounts by secure scratch-free straps for quick and convenient access to energy bars, gels, or other energy items you need. Capacity: 0.4 L Compartment: One main Bag Attachment: Nylon straps Mount: Fits Ø35 - Ø73 mm Head Tube Diameter: Fits Ø30 - Ø50 mm Added Feature: Secure scratch-free straps Size: 24 x 6 x 4 cm / 9.4" x 2.4" x 1.6" Weight: 74 g / 2.61 oz Note: Sand, dirt, mud, etc., and bags that are incorrectly packed may cause the bike frame paint in contact areas to become dull or scratched over time. To avoid any potential damage, you should protect the frame or rack with foam covering or protective film before attaching bags or panniers.