Everconn Flex Skater Dolly Stabilizer Table Top Slider for DSLR Camera and 11 inch Magic Arm, optional electric motor car Anodized aluminum construction Aluminum axles can also be locked in place High quality durable and sealed bearings. black color on wheel It glides straight or in circles included one Magic Arm 11 inch ARM;Friction Articulating. It can hold moe than 2kg.