Blue Training Stand Kit Gear Sponge Ball for Trex Align 400 450 RC Helicopter Product Name : RC Helicopter Stand;Fit for : RC Helicopter Training Gear Ball Dia. : 40mm/ 1.6";Center Hub Dia. : 40mm/ 1.6" Each Rod Length : 33.5cm/ 13.2";Material : Plastic, Sponge , Metal Color : Black, Blue, White;Total Weight : 72g Package Content : 4 x Training Gear Balls4 x Rods2 x Center HubsSome Spare Parts