Wltoys V977 Upgraded Parts 2.5mm Square Tail Boom

WLtoys V977 Upgraded Parts 2.5mm Square Tail Boom There are solid and hollow tail booms: B is hollow,A is solid. With solid tail boom, with rubber covered wire, heat shrinkable tube set with 3 mm. Description: Item Name: Tail Boom Longer than the original tail boom about 2mm,lock tail better. Usage: Spare parts for WLtoys V977 RC Helicopter Package Included: 2 x Tail Booms