Detailed Product Description Product Feature·Light-weight & compact design·Dual plate or single plate·Spring loaded disc·Resilient or Metal seated Product Specification/ModelsSize: 2"56" Rating: ANSI Class 1500LB~600LB Materials : WCB,LCB,CF8,CF8M,CF3,CF3M, WC6,WC9,C5,C12 or Equivalent. Actuation: