Ultra compact seat bag is hidden under the saddle with hook and loop fastening strap. Built-in anti-slip fabric provides mounting security. The Pro version adds a hidden tool compartment that separates tools and personal items for better organization. It includes a ratchet tool and 10 bits, ensuring that you won't forget your tools when you go out cycling.Key Features:Capacity: 0.3lCompartment: 2 Compatibility: up to 700 x 50c inner tube / 2 tyre levers Material: 1000d polyester, water repellent and stain resistant / aluminum ring Attachment: hook and loop fastening strap (rail wing system) tools: hex bits: 2 / 2.5 / 3 / 4 / 5 / 6 mm torx® bits: t10 / t15 / t25 #2 phillips screwdriver ratchet tool / magnetic holder Feature: hidden tool compartment Size: 11.4 x 7 x 5cm Weight: 163 g