Structure Description:Equivalent to John crane type 1 mechanical sealUNBALANCEDSINGLE SPRINGBI-DIRECTIONALELASTOMER BELLOWSSET SCREW LOCK COLLARS ... GRAPHITE,Website:http://www.mechanicalsealsenactus.com, SILICON CARBIDE, TUNGSTEN CARBIDESTATIONARY SEATS: CERAMIC, SILICON CARBIDE, TUNGSTEN CARBIDE, STAINLESS STEELBELLOWS: BUNA, VITON, EPDM ...