the largest manufacturer of self-contained Nitrogen Gas Springs for press tools in the U.K. Under its brand name Nitro Springs, Metrol commands a leading market position in the gas spring industry. Metrol Springs Ltd is a certificated ISO 9001-2000 company.Gas springs offer another alternative for more demanding return applications. Gas springs can be utilized on a stand-alone basis or as part of a "hosed" system. "Hosed" systems are as quoted as each application is handled on a case-by-case basis.