Fast Fit® Components: Castor wheels - 4 pc (706133 - can support up to 240 lbs) and 6 pc (706134 - can support up to 360 lbs). Light Stand 4 ft Uprights (706125). Extension Kit (706131). Light Stand Crossbar (706130). Sturdy hanging bar comes in 2 ft, 3 ft and 4 ft sizes (706126, 706127 & 706128). Height Reduction Kits come in 4 pc (706116) or 6 pc set (706118) - reduces overall height from 25 inches to 11 inches. Replacement Leg (706139).