What is this?The flexible rubber end caps are widely used for screw thread protectors, bolt caps, metal, and plastic pipe tubing end cover, furniture feet end protectors, etc.What will I get?Vinyl end caps, is in size of : 9/32"(7mm), 3/8"(10mm), 1/2"(12mm), 13/16"(20mm), 7/8"(22mm), 1 1/2"(38mm) inner dia.In the package of: 20pcs x 7mm Round end caps, 12pcs x 10mm Round end caps, 12pcs x 12mm Round end caps, 8pcs x 20mm Round end caps, 8pcs x 22mm Round end caps, 8pcs x 38mm Round end capsIs 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