... :1.material:made in high grade silicone rubber material,environmental safe material,non-toxic.2 ... against the sharp edges of drilled or punched holes for wiring, cable, tubing, piping, hoses, air ... , household, medical, etcProvide ServiceRubber injection molding, Rubber transfer molding, Rubber compression molding, Rubber to metal molding, Custom rubber moldingColorYellow, Red, Black, White, GrayFile ...