Specification: Prolongs product life by circulating air underneath, 12" height off the ground meets all sanitary health codes. Straight tube dunnage racks - Supports high capacity loads on all welded 1-3/4"x1-1/2" tube aluminum construction. Channel dunnage racks - Supports high capacity loads on all welded 1-3/4"x1-1/2" heavy duty tubular frame with 4" E-Channels. Choice of 12" or 8" height Stands up to tough use with all welded construction. 6pcs per box.