Swing frame enclosures allow you to access the rear of your rack system for maintenance or easier installation. Tempered glass doors and locking panels all round. 6 or 12 unit enclosures available. 6U Swing Frame Rack Mount Enclosure Cat HB-5180 Dimensions: 600(W) x 380(H) x 610(D)mm 12U Swing Frame Rack Mount Enclosure Cat HB-5182 Dimensions: 600(W) x 630(H) x 610(D)mm