IRONguard SG10 LED Stop and Go Light Signal System, 6-3/8-Inch Width X 11-3/8-Inch Height X 3-3/4-Inch Depth Housing: Safety yellow (durable plastic will not rust, pit or corrode) Power source: 115 volt AC operation (consult factory for other options) Lens diameter: 4-1/2" Measures 11-3/8" height by 6-3/8" width by 3-3/4" depth Shipping weight: 2 lbs per unit