... as: high power led led, projector lens, automobile lens, street light lens and the second stage of led application lens.We adopt ... 1.474Quality : clear and transparent , no bubble and impurity inside.Light transmittance : UP 94%Working temperature : -50~550°CSize for ... molding, grinding, polishing, inspection, testing and so on Inside quality: clear and transparent, no mould marks, no inside bubble and ...