Chromasir's optical grating ndi m'malo mwa Waters Optical grating, yomwe ingagwiritsidwe ntchito ndi UVD monga Waters 2487, 2489, TUV yakale, blue TUV, etc. kupanga zinthu zimenezo. Amapangidwa ngati malo otsika mtengo a Madzi, okhala ndi mtundu womwewo komanso magwiridwe antchito abwino kwambiri.