Description: Sturdy Material: These bicycle screw caps are made of premium stainless steel, which is durable and wear-resistant, not easy to break. Waterproof: The screw caps are waterproof and dust proof, which are both suitable for outdoor and indoor use. Smooth Surface: These bicycle screw caps surface are smooth and burr free to enhance the overall texture. High Strength: Compared with original screw covers, these plastic screw caps are harder and more durable for long-time service. Well Fit: The bicycle screw caps enjoy high accuracy and precision, can well fit your mountain bike screws, perfect replacement parts. Specification: Color: Black/Red/Blue/White Material: Plastic M5 Size: Approx. 0.83x0.4cm/0.33x0.16inch M6 Size: Approx. 1x0.5cm/0.39x0.2inch Package Size: Approx. 6x4x1cm/2.36x1.57x0.39inch Note: There might be a few color distortions due to different computer resolutions. There might be a slight error due to different hand measurements. Package Includes: 10 Pieces Hexagon socket screw caps