LOWEST LEVEL PROBE # 44-1259;USED WITH:;PROBE PLATE, 4 3/16" DIA., ;L1, L2, H, PROBE HOLES ARE 3/8" FPT,;PROBE PLATE GASKET, 4-1/4" DIA , 2 11/16" ID, RED SILICONE,;1 1/4" MT HOLE CTRS. ;FOR 2 PROBE SYSTEMS BEFORE 1999 AND 3 PROBE UNITS.;USED WITH PROBE PLATE # 26-2484;USED WITH LOW LEVEL PROBE # 44-1260;USED WITH FILL PROBE # 44-1140