1PC brass check valve with female and male thread, available in 1/2", 3/4", 1" sizes Constructed with brass body and stainless steel spring for durability and stable performance Effectively prevents backflow and features reliable sealing to reduce leakage in pipelines Easy to install and disassemble, bringing convenience for daily maintenance and replacement Widely used for fuel, air, oil, gas and various pipeline connection applications, Manufacturer: mengjiangjiang