A Wiper Seal is made of a durable plastic compound. It is made to fit snugly around the piston rod of the cylinder and prevent dust and debris from entering the cylinder. It prevents hydraulic fluid from leaking out of the cylinder and dirt from getting in.Attributes:• Manufactured with Plastic which gives excellent corrosion resistance• Manufactured to precise specifications and is built for durability and reliabilityApplications:A Wiper Seal is used to create a watertight seal in pull down cylinder and protect its parts from wear and tear.