Product Description Fluidix Jet Wall Fitting Part # 6540-642 For use with the following components: Jetface: 6540-643 Jet nozzle: 6541-010 O-ring: 6540-522 Retaining nut: 6540-644 Jet back: 6540-646 Please note: All of our parts are 100% new, OEM parts direct from Jacuzzi Hot Tubs or Sundance Spas.