SPECIFICATIONS Material: Special design, natural finish, high-strength,extruded 1/8 (3.1mm) thick aluminum (6063-T6 alloy). Construction: Pass-thru design, aircraft-riveted construction throughout. Top & Bottom: 11/2 x 11/2 x 1/8 (38 x 38 x 3.1mm) angleshape riveted to four corner posts. Closed bottom. Corner Posts: 11/2 x 11/2 x 1/8 (38 x 38 x 3.1mm) angleshape. Slides: 3 x 41/2 x .100 (76 x 114 x 2.5mm) extruded varislides , with top, center and bottom slides riveted in place, remaining 10 sets adjustable on minimum 3 (76mm) centers. 1/2 (12mm) diameter stabilizer rod positioned at center, front and back. Casters: Two B5DN on back -5 (127mm) double ball bearing swivel, ball bearing axle, nickel-plated, donutneoprene-tired, pre-lubricated, bolted through separate fulllength, angle-formed, 1/8 (3.1mm) thick aluminum plates to bottom of chassis. Two B5DNB on front same as above, with wheel brake. pan rack| full height rack| mobile rack Furniture