Check the listing for details. Surefire Filter Assembly RED 1.37" Bezel FM45 BRAND NEW!!. Condition: New other (see details). Listed at 55.00 USD. NEW but NO packaging is available. The FM45 is a red filter for flashlights and WeaponLights with a 1.37" bezel diameter. Produces a smooth beam of red light that will not degrade night vision as white light would. Use the red filter to avoid spooking game during pre-dawn hours - deer see poorly in the red color spectrum. The filter is also useful for close range, non-tactical applications - such as map reading -- as it reduces the intensity of light output. Applying thumb pressure to the locking tab releases the cover; a spring mechanism keeps the open cover out of the way by holding it flat against the flashlight. A cam-locking lever keeps the entire unit securely attached to the flashlight. Cam-locking lever keeps filter securely attached to flashlightSpring-loaded filter lid stays up when open, locks in closed positionProvides secondary protection to flashlight windowHelps preserve dark-adapted visionFits: All flashlights and Wpon Lights with a 1.37" bezelRETAIL PRICE: $159.95 100% GENUINE SUREFIRE BRAND PART GUARANTEEDMADE IN USA