Perko 1-1/8" Thru-Hull Fitting f/ Hose Bronze Made in the USA [035006ADPP] Brand_Shakespeare These solar lights are mounted

These solar lights are mounted on top of a sturdy steel base

The readings whilst tacking are always the same

Mounting Holes Accept 1/4" (M6) screw

For still water use

Perko 1-1/8" Thru-Hull Fitting f/ Hose Bronze Made in the USA [035006ADPP] Brand_Shakespeare These solar lights are mountedPerko 1 1 8" Thru Hull Connection f use with Hose Bronze Flange is machined to fit and grooved to retain bedding compound neck is threaded to approximately 3 16 inch from flange. Cast bronze, plain or chromed brass Regular or short length versons Regular Length Fits maximum hull thickness up to 2 inches Short Length For thin hull sections up to 5 8 inches maximum Regular Length Plain Bronze Technical Information: Hose Size Inches: 1 1 8 Mounting Hole