Wipers can increase the life and long-term performance of ball bearing screws by preventing most dirt and other foreign matter from entering the ball nut.Two replacement wipers. No retainers.Snap-in wiper kits prevent internal ball nut contamination which decreases performance and dynamic life ratings.SpecificationsSpecificationsValueModel CodeR-1501/02/47/20Temperature Max300 °FTemperature Min-65 °FDimensionsDimensionValue[D1]2.096 in[L1]0.13 in