Dave Brown Adapter Nut Long 8x1.0mm DAVL810 Dave Brown adapter is plain black, CNC machined steel construction. Use with 2-3/4"to 3" spinners. This prop adapter kit tightens the backplate and propeller onto the engine, then using a single bolt-on design, holds and centers each spinner perfectly on its baseplate. Will fit the following engines:YS .90-1.2 4-Stroke, Enya 1.2R 4-Stroke, OPS Super .60 and .61 5-Port.Although it will depend on the thickness of your