The CTA Manufacturing Brake Bleeder Tank and Adapter Set, No. 7310M, includes 12 master cylinder adapters, one quick coupler, and a pressure bleeder tank to service most makes and models. Simply select the appropriate adapter and securely screw it on the brake master cylinder. Then, attach high pressure air using the included Quick/Nitto connector on top of the connected/screwed in adapter. Gradually increase the air pressure, not exceeding 20 psi. The Nitto fitting size is 1/2".