What is this? The flexible rubber end caps are widely used for screw thread protectors, bolt caps, metal pipe, and plastic pipe tubing end cover, chair legs, furniture feet, fences port, round wire shelf, machinery end protectors, etc. What will I get? Vinyl end caps, is in size of : 8mm(5/16 inch) inner dia In the package of: 50pcs x Rubber end caps Is there any advantages of the product? Soft, lightweight, small size, durable, and long service life; Rubber material, good insulation; Easy to install and use. How to use it? Steps of installation: 1. Prepare rubber end covers with appropriate size; 2. Insert the end of screws, bolts, pipes, etc. What should I notice? Please pay attention to the selection of rubber end caps with appropriate size, especially the inner diameter