Caterpillar Seal O Ring (1996163) 199-6163 available in our online store. The main seal material is made of rubber, and it is a standard seal/o-ring type. The size is 365 inches, with a cross-section diameter of 0.21 inches, an inner diameter of 6.98 inches, and an outside diameter of 7.395 inches. The hardness (Shore A) is 78, and the SAE AS568 Dash Size is -365. The seal is made of HNBR (hydrogenated nitrile) material and coated with PTFE (polytetrafluoroethylene). The weight of the product is 0.1 lbs, and its dimensions are 18.5 cm in length, 18.5 cm in width, and 0.5 cm in depth.