Brand N/A Model W325 Quantity 2 Piece(s)/pack Color Silver+Black Material Aluminium+PU Compatible device Universal Functions RC Airplane PU Wheel Other Feature The wheel is made of imported PU foaming instead of filling other padding so its density and hardness are all balanced let alone its durability. -The wheel hub is made of aluminum alloy and casting processed much durable than other wheel hubs. We machined the hub again to make it to be out of roundness. Polish and electroplating treatment on the surface is to improve the density of wheel hub. -The wheel hub is composed of two separate pieces for users to change the tires conveniently. Other integrated wheel hubs will damage tires when imbedding it and easy to occur tire burst when landing off. Fetures: -Outer Dia. of Wheel Hub: 35mm -Outer Dia. of Tire : 83mm (3.25inch) -Inner Dia. of Hub : 4mm -width Wheel: 30mm Packing List 2 x RC Airplane/Aircraft PU Wheel with Dia-Casting Aluminum Hub