Features custom cap to fit most early model American made cars and trucks with internally threaded master cylinder reservoirs from the 1930s through the early 1960s. Includes deluxe machined aluminum cap and brass swivel fitting. All bleeders come with a full 1 year warranty. The cap on the 0102 also fits many trailers with a hydraulic master cylinder. If the master cylinder has a male threaded cap 1.25″ in diameter at the threads and 18 TPI, you can use this cap to bleed the brake system on your trailer. This kit includes adapter 1102.