Oring 3.5x50 3.5mm x 50 mm Seal Sil Silikon Tebal 1mm Diameter Dalam 50mm Tahan Panas | Hivo Heat & Low Temperature Ozone Weather Resistance Silicone Rubber Seals Sealing Ring O-Ring | 57x3.5 57 x 3.5 OD : 57mm ID : 50mm Thick : 3.5 mm | O Ring 57*3.5