silicone rubber washers for Auto parts/food grade silicone gaskets/White Silicone ... injection molding, Rubber transfer molding, Rubber compression molding, Rubber to metal molding, Custom rubber moldingColorYellow, Red, Black, White, GrayFile FormatSolidworks ... ,or transparent. And any shapes, round, square, oval silicone washers are ok for providing.welcome to customize.Production workshop