OMPHOBBY M4 Helicopter Tail Fin - Classic Blue OSHM4034B Sale! from 470 /per Qty. Add to Cart This item is a recurring or deferred purchase. By continuing, I agree to the cancellation policy and authorize you to charge my payment method at the prices, frequency and dates listed on this page until my order is fulfilled or I cancel, if permitted. This is a replacement tail fin for the OMPHOBBY M4 Helicopters Contents Tail Fin-1Socket cap screw M2.5x6-2 Qty available:4 SKU:OSHM4034B