GTKN.75X90.ND 17A GTKN.75X90.ND 17A. PISTON GUIDE RING, MODEL NO.: GTKN.75X90.ND 17A; PISTON ORING, MODEL NO.: GTKN.75X90.ND 17A; PISTON, MODEL NO.: GTKN.63X90.ND14A; PISTON PAT , MODEL NO.: GTKN.63X90.ND14A; PISTON GUID RING , MODEL NO.: GTKN.63X90.ND14A; PISTON ORING , MODEL NO.: GTKN.63X90.ND14A; BALL FOR VALVE ALFA 11HP SEATS FOR VALVE ALFA 11HP FLANGED BALL VALVE ALFA 11HP Coil-III-24VAC-DC-16-01-FR DN15 DN25 DN50 O-Ring set in NBR for pneumatic actuator type AVT 210 (KZPAA210)