1) Fast Fit Components: Caster wheels: 4 pc (#706133 – can support up to 240 lbs) or 6 pc (#706134 – can support up to 360 lbs). 2) Light Stand 4 ft Uprights (#706125). 3) Extension Kit raises your light hanging bars (#706131). 4) Light Stand Crossbar (#706130). 5) Sturdy hanging bar comes in 2 ft, 3 ft and 4 ft sizes (#706126, 706127, 706136, 706128 & 706129). 6) Height Reduction Kits come in 4 pc (#706116) or 6 pc set (#706118): reduces overall height from 25 in to 11 in. 7) Replacement Leg (#706139).