Image Item No. Description  90607  Hero Factory Arm / Leg with Ball Joint on Axle and Ball Socket and 2 Pin Holes Catalog: Parts: Hero Factory  90605  Hero Factory Arm / Leg with Ball Joint on Axle and Ball Socket and 4 Pin Holes Catalog: Parts: Hero Factory  90608  Hero Factory Arm / Leg with Ball Joint on Axle and Ball Socket and Pin Hole Catalog: Parts: Hero Factory