Mpi Oil Drain Kit 12Mm X 1.75 Thread 308-0380 MPI's oil drain kit allows you to quickly & easily drain Mercruiser inboard marine engines with a 12 x 1.75 mm thread oil pan drain plug port. Inboard/Outboard oil drain kit Fits 1996 and later GM marine engines with metric 12 x 1.75 mm thread oil pan drain Oil drain hose measures approximately 3/4 in. outside diameter and 42 inches long Threads into the bottom of oil pan to allow draining of engine oil Simply push the hose through the transom drain plug hole or place anywhere below oil pan Assembly includes oil resistant hose with non-corrosive brass fittings