The GFS Wiper Snap-In is a good choice for light and medium duty hydraulic and pneumatic applications. The snap-in design is over-sized for a secure fit and stability. The wiper is designed to fit standard D housings. The geometry of the wiper lip ensures that contact is maintained to the surface of the rod to prevent contaminants from entering the cylinder. The standard material offering is a 95A durometer polyurethane; additional materials can be supplied upon request.