OTG goggles reinforced with lip seal , visible light transmission: approx. 60% ,color: light gray 900-<(><<)>1025 DIRM LB7 LV CE (OD7+) 1025-1400 D LB7 IR LB8 M LB9 LV CE (OD9+) >1400-3000 D LB5 IRM LB4 LV CE (OD5+) >3000-11500 D LB5 I LB4 R LB2 LV CE (OD5+)