9 Resonant Cavity Cell (.STEP files) Semi-clear PVC pipe (USA - Ebay distributor): Semi-Clear PVC Pipe Main Cell Body: Main Body-NineResonantCavity_12-31-25.step Electrode Cap: ElectrodeCap-NineResonantCavity_12-31-25.step Top Plate: TopPlate-NineResonantCavity_12-31-25.step Bottom Plate: BottomPlate-NineResonantCavity_12-31-25.step 4 Inch Milled Inner Electrode: InnerElectrode-NineResonantCavity_12-31-25.step Complete Assembly: