ZnSe CO2 focusing mirror We 1 a kind of 3 kinds of quality: 1: ZnSe(PVD), adapt to small power below 80 watts. 2:ZnSe(CVD). 3:ZnSe(II-VI). They are sorted by quality and price: 1:ZnSe(PVD):2;ZnSe(CVD)<3:ZnSe(II-VI). * The one you are looking at is 2: ZnSe(CVD), * If you need 2:ZnSe(CVD). Or 3:ZnSe(II-VI). Quality, please check the other two models in our store. * Or consult customer service. * There is a 8% discount on the purchase of 2 focusing mirrors. * Need a reflector to view other items in the store.