Heavy duty modular loading dock arm can be used with six different light heads or optional fan. Arm only. Lights and fan sold seperately. 1.5 in. square, 14 gauge steel tubing. 3 in. x 5 in. x 3/16 in. mounting plate attaches with 4 3/8 in. bolts. 5 foot long 18/3 SJTW conductor cord and NEMA 5-15 grounded plug.