Perko Barrell Bolt GPS Underwater lights are just as

Underwater lights are just as susceptible to marine fouling as any other underwater surface which can result in reduced visible light

suitable for coolant or hydrocarbons

Barb Length: (inch) 1-1/2"

and a long cuff design

Designed in one piece and without any seams to obtain maximum comfort preventing skin irritation

Perko Barrell Bolt GPS Underwater lights are just asChrome Barrel Bolt 5" Features: Chrome Plated Bronze Body & High Impact Black Nylon Bulkhead Keeper 3 8" Diameter Bolt Bulkhead Keeper Easily Installs in a 5 8" Hole Includes Friction Pad to Eliminate Rattle and Provide Smooth Operation Overall Dimensions: 5 1 4" x 1 7 16"