... :NBR, etc. 2.Quality certificate: ROHS, SGS 3.OEM service, Customization OEM/ ODM Silicone rubber seal for industry1. Materials: Silicone rubber: NBR, NR, EPDM ... , etc.2. Quality certificate: ROHS, SGS3. OEM service, Customization is welcome4. Application: For industry machines seal, water seal, oil seal and gas ...