OMPHOBBY M4 Helicopter Main Pulley 99t(Black)OSHM4023B Sale! from 3423 /per Qty. Sold Out This is a replacement main pully for the OMPHOBBY M4 Helicopters Contents Main Pulley-1Main Pulley Flanges-2M2x3 Countersunk screw-12M2.5 Nylon locknut-1Socket cap screw M2.5x14-1 Qty available:0 SKU:OSHM4023B