Arrma brand pair of optional Aluminum Wing Buttons in Black from Arrma.FEATURES:Fits the Arrma Kraton, Senton, Talion and Typhon vehiclesInstalls on top of wing between wing and wing fastenerConstructed of CNC machined aluminum, black in colorYOU WILL RECEIVE:Two Aluminum Wing Buttons in BlackSPECIFICATIONS: Outer Diameter: 0.54 (13.7mm)Inner Diameter 0.125 (3.2mm)jxs 05/16/16ir/jxs