WLtoys V931 Helicopter Parts Tail Motor Set V931-020 Remote Control Toys Parts Item Name: Tail Motor Set . Brand: WLtoys . Mode: V931-020 . Tail motor 8520 . Plug assembly "two spell spacing 1.25mm with red black (0.1*7 strands of 35mm) of 260mm . Red to red enameled wire is connected to 0.5*225, black with yellow 0.5*225" . Heat shrinkable sleeve 1*10mm black . Usage: For WLtoys V931 Helicopter . Package Included: 1 x Tail Motor Set .