Sturdy, welded steel construction for superiorsafety and strength; Heavy gauge, steel frame helps preventdistortion or twisting; Sold in pair; Capacity – 40 US Ton - 44 Metric tons (20 US/ 22 Metric tons per stand); Min height – 12" (304.8 mm); Max height – 20" (508 mm); Weight – 72lbs (32.6 kg)