From AUTOMAJOR, this manual fluid transfer pump kit is built for clean, controlled transfers during automotive service. The set includes four interchangeable cap adapters (38mm, 40mm, 43mm and 50mm) to fit many gallon bottles and wide-mouth quart bottles, plus extension tubes (7", 4.5" and 3") for added reach. Use it for gear oil, transmission fluid and other automotive fluids where controlled flow matters. Compatibility note: designed for wide-mouth openings and not intended for standard/narrow-neck quart bottles—please verify your bottle opening type and size before purchase. In the box (by AUTOMAJOR): hand pump with hose, 4 cap adapters, 3 extension tubes.