This compressor works to increase the pressure of a fluid as needed and transport the fluid to its desired destination. COMPRESSOR 86508521 Parts Included: Compressor (x1) Specifications Weight: 18.50 lbs. Dimension A (1): Vertical fittings with #8 and #10 o-ring seal Dimension B (2): 3 1/4″ Inner ear measurement from front to back Dimension C (3): Without charging ports, with one wire pull connector Stocked as: AG518204 Fitting TR87, Tr88, Tr89, TR97, Tr98, Tr99