The Marine Engine Oil Drain Hand Pump, constructed of polished brass, measures 10.25 inches (26 cm) in length and 1.25 inches (3.2 cm) in diameter, with a 1-gallon (4 liters) per minute output. Compatible with oil dipstick tubes of OMC, Mercruiser, and other marine engines, this hand pump is designed for efficient oil drainage. It also serves as a versatile tool for bilge pumping and other liquid transfer applications, offering great flexibility and functionality. The pump comes with complete accessories for easy and quick installation, featuring a unique design that allows for convenient one-handed operation. Ensure the oil temperature does not exceed 140°F (60°C) for safe operation. The detailed usage directions ensure easy handling and maintenance. Additionally, we offer a 30-day full refund guarantee and a 12-month premium warranty, ensuring worry-free use.