Sightmark 55mm Red Blue and Green Filters. This Flashlight Filter Kit from SightMark comes with 3 durable plastic filters that ensure a long and efficient life. The red blue and green filters in the Sight-Mark Flash Light 55mm Diameter Filter Kit each serve a different function and will make sure that no shooter is caught unprepared. Coupled with the appropriate Sightmark products this Sightmark Filter can take night vision to the next level while protecting their investment. For a great way to enhance your already incredible Sight Mark Flashlight choose the Sight-Mark Red Blue & Green Flashlight 55mm Filter Kit for H840 Flashlight. Make your Mark. Specifications for Sight Mark 55mm Filters for H840 Flashlights - Red Blue Green: Diameter: 55mm Color: Red Blue Green Material: Plastic For: SightMark H840 Triple Duty Tactical Flashlight Features of Sight-Mark H840 Tactical Flashlight Lens Filter System - Red Blue Green: Durable Lightweight Blue filter for highlighting blood trails Red filters for spotting game w/o detection Green filter for night adapted vision protection Package Contents: SightMark Red Blue & Green 55mm H840 Triple Duty Flashlight Replacement Filters SM73004K-001 SM73004K-001: SightMark Flashlight Filters - 55mm Red/Blue/Green Plastic