Discover the high-performance PTFE Back Up Ring Hydraulic Seal Rings, designed for wear resistance and durability. Ideal for machinery repair shops, construction works, and energy & mining industries. These white nylon material rings, with sizes like T3G 28-32-1.25 and 205-215-1.9, withstand temperatures from -35℃ to 220℃ and pressures up to 33MPa. Certified by ISO9001, they are essential for hydraulic cylinder repairs.