Cannula needle fitted with a safety device with passive irreversible mechanism. Sterile, single-use, for the administration of solutions and/or other preparations, they are available in two-way with flaps and one-way without flaps. They are non-toxic and apyrogenic, latex free, ethylene oxide sterilised and packaged in single, rigid, colour-coded blister packs. The intuitive safety mechanism, also colour-coded, for immediate gauge identification, covering the entire needle tip, ensures maximum protection from the risk of accidental puncture and prevents possible reuse of the device. They are fitted with a polyurethane cannula, also available in Teflon.