These gravity flow racks allow front feeding and keep products at pick point. Uprights and horizontal beams are made from 1-3/4 square tubular steel. Welded base plates allow floor anchoring. Assembly flow racks include four 12W roller tracks per level. Levels adjust at 1" height increments. Powder coat finish. Rollers are 3/4 diameter tempered aluminum with full length 3/16 steel axles. Flow racks feature 1000 lb. capacity per level. Starter Racks include 4 upright posts, 4 front to back beams, 2 cross beams per level, 4 roller tracks per level and hardware. Add-on Racks include 2 upright posts, 4 front to back beams, 2 cross beams per level, 4 roller tracks per level and hardware. Easy assembly. 7 Year Limited Warranty.