High-Quality Material: Industrial powder coating kit made of silicone rubber. Sturdy, corrosion-resistant, with good sealing properties, not easy to crack, and heat resistant up to 200-300°C. Package Quantity: Includes 110 rubber stoppers in 8 different sizes, ranging from 1/16 inch to 5/8 inch. Colors include red, black, yellow, and blue, suitable for various hole sizes. Plastic Box Packaging: Tapered hole plugs packed in a plastic box with compartments separated by size for convenient use and storage. Wide Application: Solid rubber stoppers used for hole plugging, spraying, coating, paint protection, and blocking transmission, brake, vacuum lines, and ports in chemical, mechanical, construction, or laboratory settings. Color: As shown Material: Silicone gel Size: 17.60 x 9.91 x 2.59 cm Package Contents: 110 x Silicone Rubber Tapered 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) Note: Light reflection and different displays may cause slight color variation between the item and the image. Measurement error allowance is +/- 1-3 cm.