View cart “Rubber Inserts for the Air Line and He & O2 Vent Caps” has been added to your cart. Top/Bypass Fitting for 18/20 mm Tube$40.00 Top/Bypass Fitting for 18/20mm Tube Top/Bypass Fitting for 18/20 mm Tube quantity Add to cart SKU: 96012 Category: Spare parts Additional information Additional information Package 1 Related products Add to cart Blanking Nut, Brass $16.00 Add to cart T-Connector, 5 mm Poly. (Blue) Tube $15.00 Add to cart Cap for air lines $25.00