Topog-E(R) Series 180 Black Rubber Manway Gasket, 11-5/8 in x 15-5/8 in x 1-1/4 in, 1/4 in thick, Obround, Package of (2) gaskets. Maximum Pressure/Temperature Rating 180 PSI (12 bar) for Steam up to 380°F (193°C); 200 PSI (14 bar) for water, condensate, air, etc. up to 300°F (150°C). Excellent resistance to Steam, Hot & Cold Water. Good resistance to Alcohols, Ketones, Phosphate esters, Silicone oils and greases, Dilute acids, Bases, Salts, Glycols, Ammonia, Selected refrigerants, Animal and vegetable fats, Water treatment chemicals when used in accordance with supplier’s guidelines. NOT RECOMMENDED FOR USE WITH high concentrations of aromatic hydrocarbons, chlorinated solvents or petroleum-based oils, fuels and lubricants. Applications include Steam & Hot water boilers, Water softeners, Hot water heaters, Steam humidifiers and cookers, Water purifiers and demineralizers, Refrigeration units, Liquid treatment vessels, Carbon absorption and filtering vessels, Dryer cans in paper mills, Water hydrants, Mixing tanks, Compressed air tanks, Various types of dryers, Air starters and receivers, Deaerators, Hatch covers, Water towers and columns, PVC reactor vessels.