EASE OF USE - Fits standard quart plastic bottles for straightforward, spill-free fluid transfers to your boat's lower unit UNIVERSAL COMPATIBILITY - 3/8' standard metal threaded fitting ensures a perfect fit for Mercruiser, OMC, Evinrude, Johnson, and more 8MM INCLUDED - Aluminum adapter fits Yamaha, Nissan, Tohatsu & Honda lower units REACH HARD-TO-ACCESS AREAS - Flexible hose design allows you to easily reach and fill hard-to-access fill plugs, making maintenance a breeze DURABLE CONSTRUCTION - Crafted for longevity with a metal threaded fitting that securely attaches to various lower unit models for reliable use STREAMLINE BOAT MAINTENANCE - Simplifies the flushing and filling process, saving time and preventing messes during routine maintenance tasks GENERAL APPLICATION GUIDE - Check with your engine manufacturer for specific fitting thread size to ensure the perfect fit for your boat