This 40 Piece Silicone Plug Kit is a great fit for anyone who needs premium quality silicone plugs. While most commonly used for masking purposes during powder coating and painting, there are hundreds of other uses around the shop, home, lab, classroom, etc. You will receive 5 of every common size plug (40 total) to fit any size hole up to 3/4"(19mm). This superior grade of silicone is capable of withstanding temps up to 600 degrees Fahrenheit (315 Celsius) for at least 20 minutes and holds up to most chemicals. It is ultra tough yet flexible, reusable and will not crack, harden, shrink or break over time. Unlike the competitors, all of our premium silicone goods are color coded for ease of use and the color will never bleed or fade.