... stability, long life,low price DM650D5 red dot laser module Characteriscics:High-quality laser diode,optical glass lens, driver ... 16*120mm,20*80mm,26*105mmcircuit:APCFocus: fixed / adjustablematerial of module housing : cooper / aluminumSpan of Life: 8000-10000hoursSpot diamension: ... industrial,architectural, medical, scientifics,enterainment, military,levellighting, etc. 650nm 5mW Red Dot Laser Module