DISTORTION FREE VISION CAN BE WORN OVER CONVENTIONAL GLASSES USE WHERE JOB INVOLVES LOW VELOCITY DEBRIS - SANDING, PLANING ETC NOT FOR USE WHERE DEBRIS IS HIGH VELOCITY - ANGLE GRINDER, CIRCULAR SAW ETC. POLYCARBONATE LENS DIN EN166 MINIMUM SALE QUANTITY OF MULTIPLES 12 INNER/CASE QUANTITY: 12/300 FULL PRODUCT DIMENSIONS 16x6x6