CO2 laser engraver lenses and mirrors measure 3/4 in. OD and come in 1-1/2, 2, 2-1/2, 4, and 5 in. focal lengths, with 1/2 to 1-1/2 in. OD and focal lengths up to 25 in. available. Premounted, direct OEM replacement lens assemblies, suitable for Epilog, Vytek, Universal, and other engraving lasers, can be installed into user-supplied mounts.