ROBERT SHAW CF Z68426 Commercial electric thermostat --- 4 POLE WITH POSITIVE OFF --- BULB 1/4 X 7 --- TIN/ZINC --- Cap 42 in --- I can not find this model and or any other positive info on it, came in a box of new D1-D18s for Hobart, all made by Robert Shaw --- it has the same dimensions, mounts and bulb with heavier screws and longer terminals --- it had been put away for future use and now not needed after upgrades if you can decipher model No its your gain. . Thank You