Flange Gaskets, Compatible with Pump Type In-Line Circulating Pumps, Compatible with Series 500, 600, Compatible with Series Family 500, 600, Gasket Inner Diameter 1.98 in, Gasket Material Nitrile Rubber, Gasket Thickness 0.15 in, Includes (2) Gaskets, Compatible with Brand Taco, Compatible with Grainger Part Number 2KGV8, 2KGV9, 3GZV6, 4PC79, 5CHK4, 5CHK6, Compatible with Manufacturer Model Number 0012-BF4-3, 0012-SF4, 1400-30b-3, 1400-40b-1, 2400-30S-3P, 2400-40S-3P