OMPHOBBY M4 Helicopter Tail Pulley Flange Set(Silver)OSHM4037S Sale! from 811 /per Qty. Add to Cart This is a replacement tail pully flange set for the OMPHOBBY M4 Helicopters Contents Tail Pulley 22t-1Driver Pin Φ2*9.5-1 Qty available:1 SKU:OSHM4037S