It is for fuel and corrosive gas if it were for refrigeration it would be braise on brass with 80% duty cycle. Stainless becomes brittle when used with refrigeration gasses and fails. It does state it is designed for all fuels meaning Diesel which the most corrosive fuel their is. Diesel eats everything including ceramic eventually.The one shown is stainless seat and needle with ceramic seals and 100% duty cycle and full flow. Certainly better than a Mr gasket foreign product but about twice the cost but the could is easily changed in less than a minute should it fail ever the Mr gasket has to be removed and replaced to be serviced.