Complete Kit Of Seat and Seal For BALL-ALFA 50 3 INCH ALFA 50 SB (1) Spare ball for ball valve ALFA 50 (3) "Sealing set for ALFA 50, DN 6"" (4)"; O-Ring set in NBR for pneumatic actuator type AVT 160 (5) ALFA 60 SB (6) Spare ball for ball valve ALFA 60 (8) "Sealing set for ALFA 60, DN 1"" (9)"; O-Ring set in NBR for pneumatic actuator type AVT 075 (10) Flanged ball valve type ALFA 50 SB (11) "Spare ball for ball valve ALFA 50 DN 4"", material CF8M (13)"; "Sealing set for ALFA 50, DN 4"" (19)"; O-Ring set in NBR for pneumatic actuator type AVT 140 (15) "Flanged ball valve type ALFA 50 SB, DN 4"" "Spare ball for ball valve ALFA 50 DN 4"", material CF8M (18)"; "Sealing set for ALFA 50, DN 4"" material TFM 1600