STRAUSS Bicycle Bottle Holder and Gel Seat Cover (Black) Upgraded grip - this bottle cage is upgraded clamp with a rubber pad Expanded size - this quick release bottle cage fits for most standard-sized water bottles. 2.5 inch - 3.3 inch bottle in diameter. No tool needed - the clamp of the bottle cage is designed for easy to installation and remove, no tool needed With 3d anti-slip granules on the back, necessary tool for your outdoor cycling High density sponge slip mat comfortable and soft, ergonomic design Thick pad with shock absorption function and soften the riding, inner side the seat cover with gel-point, ensuring the seat does not slip after installation