Norden (Master), Matte Chrome with Switch & Dimmer Hardware Mounting stem is 1/2" diameter Marine East Options:Gold Trim - Chrome Shade - 24V The NS6653 model has CHFSW

Mounting stem is 1/2" diameter by 1-1/4" long

and a heat exchanger that takes hot water from the engine cooling system and uses it to heat the water in the unit

This surface-mount light housing is constructed of a carefully formulated bronze alloy with a designed underwater service life of more than 50 years

Note:Transmitter uses Torx T6 screws

Easy installation

Norden (Master), Matte Chrome with Switch & Dimmer Hardware Mounting stem is 1 2" diameter Marine East Options:Gold Trim Chrome Shade 24V The NS6653 model has CHFSW Mounting stem is 1 2" diameter by 1 1 4" long and a heat exchanger that takes hot water from the engine cooling system and uses it to heat the water in the unit