... household rubber seal, medical rubber seal, etc. Description of Wear Resistant NBR X-ring Seal: 1. Materials: NBR, also ... etc. 2. Characteristics: oil proof, aging resistant, heat resistant, wear resistant, chemical resistant, anti-corrosion, etc. 3. Hardness: 30 ... industrial, construction, household, medical and other fields. 10. QC/QA: we have strict quality control and assurance systems, have 30 QC ...