Fenix aof s filter adapter for pd35 flashlight now there are coloured filters for the pd35 uc40 and pd12 available in red green and blue features red preserves nigh vision improves night vision visibility assists in spotting game without fear of being detected green preserves night vision perfect for map reading blue preserves night vision perfect for highlighting blood trails specifications compatible with pd35 pd12 and uc40 made from pc 2805 plastic