The Silicone Round Cord Metal is a silicone rubber cord with a metal core that is used for a variety of applications including window and door seals, appliance seals, automotive seals, and more. It has a temperature range of -60°F to 500°F, can be cut to length with scissors or a knife, and comes in multiple diameters and colors. The metal core provides strength while the silicone rubber offers flexibility, durability, and weather/chemical resistance. This product can be purchased on Grainger in various lengths and diameters to suit many sealing and cushioning needs.