All-plastic fitting permits retrofitting of most manufacturers screw closures for liquid transfer when venting is not required. Consists of polypropylene fittings (2), acetal nuts (2), silicone gaskets (2), and TPE port cap. The fitting with two barbed ends is particularly useful wherever tubing must be attached on both ends. To install simply drill two 16mm holes into your closure, insert fittings, tighten and attach appropriate size tubing. Gasket and nut assemblies provide leakproof service. Units can be sterilised by autoclave, gas or chemical methods. For vacuum applications use with heavy-duty 4 litre bottle NE/2126-4000. Supplied with template and directions for use.