Details :

Ductile Iron Universal Coupling According to ISO2531&EN545Specifications
Sleeve and End Ring Material: Ductile Iron GG40/GG50
Bolts and Nuts material:Carbon Steel
Rubber Ring: EPDM/NBER
Size Range: DN40-DN600
Coating: Fusion Bonded Epoxy coating
Use: This kind of couplings can be used for ductile iron or PVC pipes.