The URH rod seal ring is the main rod seal ring made of HNBR rubber. At the same time, it can provide NBR rubber material for low temperature use. HNBR material has a higher tolerance limit than polyurethane rubber in high temperature resistance. Excellent wear resistance also ensures that even after a long time of use, it can still have a good sealing effect. The small section design is suitable for integrated grooves. It should be noted that when used under high pressure environment, please use with the baffle ring, it is recommended to use with BKU, to improve the pressure resistance when used alone. The notch design on the back of the lip eliminates pressure accumulation between the sealing rings.