Product Item: Grooved Flexible Coupling
Standard: Victaulic
Size: DN50
Wall Thickness: 4 mm
Body Material: Ductile Iron ASTM A536 Grade 65-45-12
Gasket Material: EPDM
Bolts & Nuts: ISO 898
Certification: UL/FM
Painting: Red Epoxy
Source: https://www.landee.cn/grooved-flexible-coupling-victaulic-a536-gr-65-45-12-dn50.html