High-quality material: Industrial powder coating kit is made of silicone rubber. It is robust, has corrosion resistance and good sealing, is not easy to crack, and has a high temperature resistance of up to 200-300 degrees. Package quantity: Rubber stoppers total include 110 pcs in 8 different sizes, sizes from 1/16 inch to 5/8 inch. Color in red, black, red, yellow and blue, suitable for many sizes of holes. Plastic box packaging: Conical hole plug packed with a plastic box, divided into areas according to different sizes, more convenient use and storage. Wide application: Solid rubber stoppers are used for hole plugs, spraying, coating and paint protection, and widely used to block transmission, brake, vacuum lines and ports in chemicals, machinery, construction or laboratories. Color: As shown Material: Silica gel Size: 17.60x9.91x2.59 cm Package contents: 110 * Silicone rubber conical plug (5 red 20x25mm, 5 blue 17x25mm, 5 blue 14x25mm, 10 blue 12x17.5mm, 10 yellow 9.5x19mm, 15 black 6.5x19mm, 25 red 8.7x16mm, 35 red 4.7x16mm) Only the above package content, other products are not included. Note: Light reflection 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 +/- 1-3 cm.