TBR-180 Tribar arms are support arms that hook into a CMP-485 Super Clamp (sold separately). When used together Tribar arms & a Super Clamp form one APEX tier to be used on an APEX AX-48 Pro keyboard stand. Total load capacity is not to exceed 250 lbs. & only two tiers are encouraged. The TBR-180 Tribar arms are 18-in in depth & are intended to support deeper larger keyboards synths & workstations. Also available are TBR-130 13-in Tribar arms for use w/mid- to small-sized keyboard instruments. TBR-180 Features: * Extraordinarily strong tier support arms * For use w/Ultimate Support CMP-485 Super Clamp (sold separately) * To be used on an Ultimate Support APEX AX-48 Pro keyboard stand * 18-in Tribar arms for supporting deeper larger keyboards synths & workstations TBR-180 Tribar Arms * Product Name: TBR-180 * Part Number: 16534 * Sold In: Pairs (Quantity 2) * Length: 18-in (457mm) * Load Capacity (w/CMP-485): 125 lbs. (57 kg) * Weight: 1.25 lbs. (.57 kg)