Industrial Rack Mount System PCH-R400M 4U Rackmount Chassis for ATX Motherboard SPECIFICATIONS Construction System Board Expansions Drive Capacity Cooling Dimension(mm) Heavy-duty cold-rolled steel ATX mother board Support up to 7 slot full-size cards Three 5.25" and one 3.5" drive bays(exposed) One 3.5" drive bays(internal) One 120mm ball-bearing fan (78CFM) with a removable filter 482.6(W) x 450(D) x 177(H) 1 Industrial CPU Board 2 Industrial Barebone System 3 Industrial Communication Products ORDERING INFORMATION PCH-R400M 4U height ATX M/B rackmount chassis 4 Applied Computer PCH-R420 4U 20-slot Rackmount Chassis 5 Pancl PC SPECIFICATIONS Construction System Board Expansions Drive Capacity Cooling Dimension(mm) : Heavy duty steel SBCs Support up to 20 full-size cards Three 5.25" and two 3.5" drive bays Three 120mm cooling fans 482(W) x 638(D) x 177(H) ORDERING INFORMATION PCH-R420 PCH-R420R 4U height 20-slot rackmount chassis 4U 20-slot Rackmount Chassis SPECIFICATIONS Construction System Board Expansions Drive Capacity Cooling Dimension(mm) : Heavy duty steel SBCs Support up to 20 full-size cards Six 5.25" drive bays Three 120mm cooling fans 482(W) x 638(D) x 177(H) ORDERING INFORMATION PCH-R420R 4U height 20-slot rackmount chassis with 320W redundant power supply