Compact roll-up bag with three compartments and internal organizers to keep equipment and small items in place. Durable water repellent material keeps contents dry and easy to clean. The secure clamping strap allows easy, tool-free mounting on the frame tube, seat tube or seat rails. Number of compartments: 3 Material: polyethylene / engineering grade polymer. Durable water repellent and stain resistant coating. Compatibility: Fits inner tube sizes -26" x 1.75 - 29" x 19/2.35 and 700c. Topeak CO2 inflater, CO2 cartridges, Tire levers Mounting: secure strap Location: seat rails, on frame tube Dimensions: 15 x 10.5 x 2 cm Weight: 91 g