Easy to use for do-it-yourself applications; but heavy duty construction will stand up for shop use or mobile service professionals. A built-in check valve allows easy release of displaced air and the decompression valve releases negative pressure. See-through container for quick reference and a built in pour spout for no-mess disposal. 48″ hoses with fittings included. Suitable for engine oil; gear lube; brake fluid; coolant; etc. Not for use with flammable or corrosive products. Model 756015P can be operated manually or attached to a compressor and features a 40-170 psi working range and 1/4″ air inlet.