Vacuum Flange Coupling Plate Varian ?? 3 3/4" Square Inner Mount 6.5" OD Outer This is used and looks to be in great condition. I'm not sure what it goes to, it's kind of a specialized piece. Disclaimer - Seller not responsible for any damage to life, limb, or property due to this device. Buyer must test this device to ensure it functions properly before its use. If unit is found malfunctioning this seller will offer money back. Will ship free..... please ask questions. Will ship international.... we get good rates. Contact us for prices... Vacuum Flange Coupling Plate Varian ?? 3 3/4" Square Inner Mount 6.5" OD Outer This is used and looks to be in great condition. I'm not sure what it goes to, it's kind of a specialized piece. Disclaimer - Seller not responsible for any damage to life, limb, or property due to this device. Buyer must test this device to ensure it functions properly before its use. If unit is found malfunctioning this seller will offer money back. Will ship free..... please ask questions. Will ship international.... we get good rates. Contact us for prices... Recommended products Provided by Huntington Vacuum Reinforced Hinged Flexible Coupling Flange 3" ID 4.5" OD 6.5" View item Huntington Vacuum Vac-U-Flange Flexible Coupling 3" ID 5.5" OD 10.5" Length View item Varian Huntington Vacuum Valve Sieve Pump Trap Unit # 0345-K011 EV-100 View item NEW MDC Vacuum Seal Top Claw Clamp Flange pn#- L400-B View item NEW Thomas Rexnord Disc Flexible Coupling Moline LOT of 2 # 10663 6701690 View item Blazers Vacuum Gas Pressure Gauge PN#- TPR 017 KF Pfeiffer View item Perkin Elmer Vacuum Control Unit model# - 2240540 / 151235 - Untested / filament View item MKS HPS Right Angle Vacuum Bellows Valve #37223-B 4" HUGE 16" OAL View item