These 87" High industrial steel shelving units feature 14 gauge cold rolled steel uprights for strength and rigidity. Posts allow shelf height adjustments at 1-1/2 increments. Choose from 20 and 22 gauge steel shelves that include zinc-plated shelf clips for easy installation and height adjustments. Uprights are punched on 3 centers for easy anti-sway brace or panel installation. Welded 12 gauge foot plates allow floor anchoring. Beaded front uprights are roll formed into an 11/16W x 2-9/16D tubular section and have rear flanges that are welded on 6 centers to provide maximum strength. Open Shelving Units include 11 gauge cold rolled steel side and back anti-sway braces for rigidity of shelving unit. Closed Shelving Units include 24 gauge cold rolled steel panels that enclose unit to retain contents. Starter Units include 2 beaded and 2 angle posts, 5 shelves and cross braces or panels. Add-On Unit includes 1 beaded front post and 2 angle back posts, 5 shelves and cross braces or panels. Gray enamel finish. Easy assembly.