Body: Ductile iron, Disc: Aluminium bronze, Seat: EPDM, Shaft: Stainless steel grade 410 – 1.4006, Taper pin: Steel grade 316, Key: Carbon steel, O-ring: Nitrile (Buna), Shaft bushing: PTFE., Body: Ductile iron, Disc: Aluminium bronze, Seat: EPDM, Shaft: Stainless steel grade 410 – 1.4006, Taper pin: Steel grade 316, Key: Carbon steel, O-ring: Nitrile (Buna), Shaft bushing: Bronze.