FLAME SWITCH, CONTAINS MERCURY, HARPER WYMAN,;26" CAP, BULB 1/8" X 2-3/16", NORMALLY OPEN PILOT SAFETY,;METAL MOUNTING PLATE W/ 2 EA MT HOLES CTRS 1-5/8".;2EA 1/4" TAB TERMINALS, N.O.& COM,;2 SHEET METAL MT SCREWS,;INCLUDES INSTRUCTIONS;THIS IS THE OLD STYLE KEATING FLAME SWITCH.;FOR NEW STYLE KEATING FLAME SWITCH, KEATING SUPPLIES A;CONVERSION KIT. MODEL AND SERIAL #s REQUIRED. SPECIAL ORDER