Set universal stand offs to put dual carbs on a Kohler Command 18-30hp horizontal engine. These are machined from a solid piece of 6061 aluminum. They measure 2-1/2 out from the face of the block and have a 2 bolt pattern that’s 5/16-18 threaded holes 2-3/8 C-C. Both of them have 1/8 NTP thread in the body for fuel pump pulse. Comes with two stand offs, 4 mounting bolts, one plug and one hose fitting.