Suitable for models PL70, PL70r and PL80 (for a list of other compatible products go to www.walther-pro.com). Four rugged glass filter discs with a special coating, 1.5 mm thick, in four matte-finished polymer collars made of rugged polypropylene. Color filters can also be used in combination with the white signal cone (Art. 3.7078). Functions: red to preserve night vision, blue for better detection of body fluids (blood, sweat, etc.), yellow for less glare in fog, green for game observation.