OSP Cases | ATA Road Case | 3-Space Amp Rack | 20" Deep | RC3U-20 Rugged 3/8" Plywood with Black Laminate Tongue and Groove Metal Railing with High-Impact Ball Corners Industrial-Grade Rivets, Latches, Slip-Resistant Rubber Feet 3-Space standard 19" Rack Rails (Front/Back), 20" deep (excluding lids)