Our factory produce ZK-16D infrared absorbent & color corrected filters for medical and surgical application purposes. The ZK-16D compounded Na2SiO3, CaSiO3, SiO2, Cu2O, CuO, CdO, Au, CO2O3, Ni2O3, MnO2, AgCl/AgBr, etc. formed most types of cylindrical, semi-cylindrical and disk types heat absorption glass filters. 85% of IR rate can be absorbed start from 900nm of wave length. The item be used for medical & surgical apparatus widely. Details please visit our URL.