HUINA 1538 RTR 1/14 RC Timber Grab Truck Dumper Toy 2.4G Radio 1200MAH Battery. HUINA 1/14 2.4G 10CH RC Loader 1583 Electric Lifting System Lights Sound Battery. Material Composition: Made primarily of stainless steel, zinc alloy, iron, aluminum, copper, polycarbonate, rubber, and other durable materials for longevity and performance.