Oring 1.9x31.2 1.9mm x 31.2 mm Seal Sil Silikon Tebal 1mm Diameter Dalam 31.2mm Tahan Panas | Hivo Heat & Low Temperature Ozone Weather Resistance Silicone Rubber Seals Sealing Ring O-Ring | 35x1.9 35 x 1.9 OD : 35mm ID : 31.2mm Thick : 1.9 mm | 35*1.9