OCAL™ GUA Series double-coated conduit box provides access to wiring, directional changes in conduit and more. Installed in hazardous areas to protect conductors, act as pull and splice boxes, provides access to conductors for maintenance and future system changes, act as mounting outlets for fixtures (with proper covers) or change conduit direction. Nominal 0.002 inch (2 mils) blue urethane coating on both interior and exterior and nominal 0.04 inch (40 mils) PVC coating bonded to exterior. All hubs have minimum 5 full threads, integral bushing and pressure-sealing sleeves. Unit furnished with internal grounding screw. Explosion-proof, dust-ignition proof, rain-tight and suitable for use in many environments.