100T Flexible Coupling Connect Method: Grooved Material: Ductile Iron confirming to ASTM: A536 65-45-12 equal to QT450-12 Surface Treatment: Epoxy/Painting/Galvanized/Darcomet Bolts and Nuts: ISO 898-1 class 8.8 Gasket: EPDM /NBR/Silicon Thread : BSPT & NPT Packing:In carton on pallet or wooden crate Approval: FM, UL, CE