Contest 101 Bulkhead Mount Compasses Designed for powerboats and sailboats 26'-40'. Can be mounted in bulkheads of any thickness, then read easily from both the cockpit and the cabin. The double-gradated, 4" apparent card is illuminated for night viewing. Same mounting footprint as the Contest 100 for those who want to upgrade to a more modern look. The watertight assembly includes a clinometer Requires 5 1/4"dia. cutout 5-year warranty