Type 12 enclosures have sturdy unibody construction and flexible internal mounting options. 12 gauge steel. Seams continuously welded and ground smooth; no holes or knockouts. Stiffeners on back of two-door enclosures maintain flatness and increase rigidity. Lifting eyes for easy handling. 3-point latches operated by oil-tight key-locking handle. Latch rod rollers for easy door closing. Concealed, easy-to-remove hinges. Data pockets are high-impact thermoplastic. Internal mounting channels welded horizontally to sides at top, bottom and center. Optional panels and rack mount angles can be mounted anywhere along channels. Oil-resistant door gasket. Bonding provision on door. Provision for mounting fluorescent light.