silicone rubber washers for Auto parts/food grade silicone gaskets/White Silicone GasketMaterialNR, NBR, ... metal molding, Custom rubber moldingColorYellow, Red, Black, White, GrayFile FormatSolidworks,Pro/Engineer,Auto CAD,PDF,JPGServiceWarm and quick response service provided ... . And any shapes, round, square, oval silicone washers are ok for providing.welcome to customize.Production workshop