This product will protect the cleats when riding or walking, and increase traction when walking, which is and easy to install. If you walk for a long time without a cleat protective cover, you may grind the of the screw flat. Made by plastic, which is portable and wear-. It only fits for Zero Aero. It cannot be used on the non-Aero pneumatic version, otherwise it will fall off. Colour: Yellow Material: plastic Package Contents: 1 pair x Bike Cleat Pedal Cover Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. If you walk for a long time without a cleat protective cover, you may grind the of the screw flat. This product will protect the cleats when riding or walking, and increase traction when walking, which is and easy to install. It only fits for Zero Aero. It cannot be used on the non-Aero pneumatic version, otherwise it will fall off. Made by plastic, which is portable and wear-.