【Universal Fit】This fluid hand pump features dual connectors of 3/8"-16 (9.53mm) and 8mm (0.31"), ensuring compatibility with mainstream American and Japanese outboard engines for exceptional versatility. 【Fits Most Standard Quart Bottles】The gear oil transfer hand pump supports the vast majority of standard quart bottles on the market, as well as 32 oz (946ml) marine gear oil bottles—no special containers required. 【Efficient & Precise】The fluid transfer pump utilizes a dedicated lower unit oil change design, ensuring a clean, leak-free process with one suction and one fill. It delivers a consistent 8cc per pump stroke, making oil changes both efficient and precise. 【Reliable Performance】Engineered to withstand marine environments, the lower unit gear lube pump resists aging for long-term reliability in routine boat maintenance. 【Easy Installation】The gear oil pump head comes with a suction tube extending to the bottom of the bottle, compatible with mainstream oil extraction systems for simple connection and effortless working., Manufacturer: LuLobtg