Quadruple 4in round light box for rubber grommet mount lights . 

Sealed, all 14ga steel, welded, light housing that can be either either welded or bolted on. 

These boxes are unpainted so you can easily weld it on or coat it to your specifications. 

Compare our heavy duty 14ga (0.078) construction with the 18-20ga ((0.05 to 0.038) common in boxes used in similar situations.