Made of soft silica gel,it is odorless,non-toxic and safe to use. First insert the smaller side of the float into the top of the handle,and then place the seal on the smaller side so that the float stays in the groove of the for valve. Silicone gaskets are often washed off,loosening the float for valve and making the pressure cooker unusable.This spare part can make your handicapped cookware work like new. It can be applied to various types of electric pressure cookers. Float for valve silicone gasket are part of the pressure cooker cover and are essential parts for the work of the pressure cooker.