8cc lower unit gear oil pump that connects to quart bottles with 28mm opening (about 1 inch), to your boat outboard motor's lower unit. Includes 3/8" aluminum swivel adapter, 8 mm and 10 mm aluminum adapter that will fit most domestic and imported outboard motor's lower unit drain hole threads. Each adapter is fitted with an o-ring for sealing. Also includes 2 lengths of suction tubes for tall and short quart bottles.