Simple, reliable and cost-effective warning system that reduces the risk of accidents around the loading dock Safety yellow polypropylene housing will not rust, pit, dent or corrode Units can be used indoors or outdoors Establishes a clear line of communication between drivers and dock personnel Shallow depth of unit (less than most dock bumpers) prevents damage to the Stop & Go Light Integral eyebrow-type sun visors create extended visibility Mounting holes conform to standard building specifications Certified for sale in Canada by an accredited certification body Housing Material: Plastic Flasher / No Flasher: No Flasher Switch / No Switch: No Switch Height: 11-3/8" Width: 6-3/8" Depth: 3-3/4" Manufacturer Part Number: SG10-24RG-LED Lens Diameter: 4 1/4" Voltage: 24 V Dimensions: 6 3/8" W x 3 3/4" D x 11 3/8" H.