“BIR” is a poppet valve quick coupling series, interchangeable with international standard ISO 7241-1 “A”, the series is manufactured in carbon steel with zinc plated surface treatment. This series offers worldwide interchangeability and the availability of a wide range of sizes from 1/4” thru 2”. This makes the “BIR” series one of the most widely used in a range of hydraulic applications mainly in agricultural and industrial fields.