... etc. Description of FLS / BR/ IIR / ECO /CSM Rubber Bellow Seal: 1. Materials: IIR,also can be ... , BR, IR, EPDM, IIR, PU,E/A, ECO, CSM, VITON, FKM, FPM, etc. 2. Characteristics: UV proof, ... heat resistant, weather resistant, etc. 3. Hardness: 30~90 shore A or IRHD as your request, tolerance ... have strict quality control and assurance systems, have 30 QC technicians and the individual testing room. 11. ...