PROBE PLATE GASKET, 4-1/4" DIA , 2-11/16" ID, RED SILICONE,;8EA MT HOLES, 1-1/4" MT HOLE CTRS.;FOR 2 AND 3 PROBE UNITS. ;FOR 2 PROBE SYSTEMS BEFORE 1999,;USED WITH PROBE PLATE # 26-2484;USED WITH LOWEST LEVEL PROBE # 44-1259;USED WITH LOW LEVEL PROBE # 44-1260;USED WITH FILL PROBE # 44-1140