12 Space Rack with 4" Casters Standard 19" Mounting Rail Width Outer Dimensions with Doors On: Height: 29" w/Casters - 23" Without Width: 21" - Depth: 26" Inside Dimensions: Rail to Back with Rear Door On: 20 1/2" Rail to Rear Edge of Case with Door Off: 18 1/2" Front Rail to Rear Rail: 17 1/2" Black with aluminum rails 3/8" plywood Light weight, Pro design Heavy duty and ready for abuse Front and rear removable doors Has dual 4" steel link locks on both doors Dual spring handles on each side Stackable corners 4 steel L brackets added for strength per side Steel rack rails - Front and rear rack rails 4 Heavy Duty 4" Casters (Two are locking) 24 rack bolts