ZHM Type Dust Seal NBR is for cylinder piston rods. Application scope of ZHM Ring Sealing: Working pressure: ≤1.0MPa Working temperature: -20℃~+80℃ Surface speed: ≤1m/s Medium: Compressed air. Installation: To avoid damage to the sealing lip, precautions should be taken during installation to avoid sharp edges. Material: High performance NBR with 80 Shore hardness ZHM Rubber O Rings order example: ZHM-22 or ZHM-22 30 8/11 or with part number WZ1009E0