42 Draft Designs PCV 90° Threaded Fitting 3/4" is designed specifically for VW & Audi vehicles. This 90° fitting is used to make tight turns and connections in your oil catch can PCV tubing. An agressive barb on one end holds 3/4" ID tubing tight. 1/2" NPT male threads on the other end allow threaded connection to any 1/2" NPT port. Hose clamps are recommended but not required. This fitting is injection molded from a glass filled nylon polymer - the same material VW uses to make their plastic coolant, fuel, and PCV fittings. This fitting is tough, oil resistant, and black!