Description: 【High Quality】: Roll up tool bag is made of high quality 600D polyester material, high density coating, fully waterproof, good performance. 【Large Capacity】: The bicycle under seat bag with multiple compartments allows you to conveniently store bike tools. You will appreciate its presence when you don't have to hide everything in your pocket. 【Saddle Compatibility】: Compatible standard saddle rails of width spacing of 36mm and height spacing of at least 30mm. 【Lightweight】: The bicycle seat bag is lightweight and does not strain the frame and therefore does not increase the burden of riding. 【Great Gift Choice】: The bicycle saddle bag provides plenty of space for small items or service accessories. The bicycle tool bag is a practical gift for a person who is often traveling by bicycle. Specification: Material: 600D Polyester Size Chart: 31cmx27cm/12.20inchx10.63inch(Unfold) 14cmx10cm/5.51inchx3.94inch(Folded) Package Includes: 1 Tool storage bag 1 Bag saddle mount Note: Please allow slightly errors due to manual measurement and different monitors.