Body: ductile iron EN-JS 1030 (GGG-40)
Cover: ductile iron EN-JS 1030 (GGG-40)
Wedge: ductile iron EN-JS 1030 (GGG-40), NBR vulcanized
Spindle: Stainless Steel. steel 1.4021
Spindle nut: Brass CW617N by CSN EN 12449
Welded ends: 1.0308 (DIN St 35) (ISO 4200 Pipe))