View cart “O-ring for bottom of tubes” has been added to your cart. Rubber Inserts for the Air Line and He & O2 Vent Caps$11.00 Rubber Inserts for the Air Line and He & O2 Vent Caps Rubber Inserts for the Air Line and He & O2 Vent Caps quantity Add to cart SKU: 80034 Category: Spare parts Additional information Additional information Package 2 Related products Add to cart Polyethylene (Blue $66.00 Add to cart Seals for 26 mm reactors $29.00 Add to cart Top/Bypass Fitting for 18/20 mm Tube $40.00