... imported hard sea led special high quality cavity laser tube,the laser has unlimited long storage life and it`s service ... has features of compact, safe ,reliable,easy to use and etc,The mail parameters:outpit power: ≥ 0.8mw power stability: better than ... than 1*10-7.beam divergence angle:1.7mard beam to diameter:0.48mmlaser head size:Ø32mm*200mm maggie: sky maggie120218 ...