The GRACO 108357 is a packing O-ring designed for use in 1:1 Fast-Ball Pumps. It is a sealing component that helps prevent leaks and ensures proper pump operation. The material is not specified in available sources. Key Features: O-Ring 108357 1:1 Fast-Ball Pumps Precise fit for pump sealing Reliable performance in pump applications Ease of replacement Applications:Used as a sealing component in GRACO 1:1 Fast-Ball Pumps to prevent leaks and maintain pump efficiency. Installation Notes: Using genuine GRACO O-rings ensures proper fit, performance, and longevity of the pump, reducing the risk of leaks and equipment failure. Ensure the pump is depressurized and isolated before replacing the O-ring. Clean the O-ring groove thoroughly before installation. Lubricate the O-ring with a compatible lubricant to ease installation and prevent damage. Inspect the O-ring for damage or wear before installation.