This is a pressure cooker valves, adoption of stainless steel, silicone material. Suitable for home, restaurant, hotel, and so on. It can help prevent steam from escaping around the base of the loosening valve. Is a very professional pressure cooker part. Features -Color:Assorted Color -Material:Stainless steel, silicone -Size:1.90X1.90X0.50cm/0.75X0.75X0.20in (negative pressure valve nut) -Size:1.90X1.90X1.00cm/0.75X0.75X0.39in (negative pressure valve base) -Size:1.20X1.00X0.30cm/0.47X0.39X0.12in (negative pressure valve gasket) -Size:2.00X0.80X0.80cm/0.79X0.31X0.31in (floater valve stem) -Size:1.70X1.70X0.20cm/0.67X0.67X0.08in (floater gasket) -This float valve is safe to touch with the pot directly, can use it without concern. -With high temperature resistance ability design, this float valve is a necessary accessory for your kitchen -The float valve is and can your pressure pot lid well, you can install it easily. -General design makes this float valve easy to fix on the cover of your electric pressure cooker. -Replacement sealing float valve for electric pressure cookers to safe cooking. Package list: 4 x negative pressure valve nuts 4 x negative pressure valve bases 4 x negative pressure valve gaskets 4 x floater valve stems 4 x floater gaskets