Note: This is a Double Bank Vacuum Gas Distributor with 4 Solid PTFE Stopcocks. The appearance and color of all products shall be subject to the real object, and there is color difference in photos. The pictures are for reference only. Parameter : The diameter of PTFE stopcock of double bank gas distributor：about 2mm to 4mm The outer diameter of main pipe: 28mm The outer diameter of the right air pouring nozzle ：10mm The outer diameter of the lower nozzle of the throttle：10.5mm The pitch between nodes ：70mm Main application: 1.The vacuum gas distribution pipe is used for the organic synthesis reaction in the laboratory and protects the reactant inert gas. 2.The vacuum gas distribution pipe is matched with thermometers, condensing tubes, stirring rods, separating funnels and other instruments to assemble a component distillation unit, a distillation unit or a reflux device to performed more complicated boiling, fractionation and purification operations . Guarantee： Vacuum gas distribution pipe belongs to glassware and is fragile. We have made shockproof and shatterproof packing, but it may be damaged in the process of transportation. If you receive damaged items or have any other problems, please contact us in time, and we will provide you with satisfactory solutions within 24 hours.