2″ MAYDAY SIGNAL MIRROR (HELIOGRAPH) This innovative mirror is lightweight. Robust and approved for marine and military use.It is highly reflective giving it a range of over 10 miles, for the small mirror and longer for the liferaft/lifeboat larger mirror. Designed for one-handed operation. • Accurate and effective • Floats • Robust • Quick and easy to use • Instructions printed on reverse side • Useful as personal travel mirror • Lanyard hole * Size: 77×50 mm. * Weight 60 grs.