The high-output white light on your Jetbeam flashlight was designed for maximum throw and brightness, but there are times where the bright beam will negatively impact your natural night vision. The Jetbeam FSR34 Red Filter is ideal for times when you need to keep your vision adjusted for night conditions, or avoid spooking game. Red light not only provides great contrast, but preserves the natural shadows developed by darkness. Not visible to the human eye over long distances, the added bonus of not interfering with night vision equipment makes the red filter ideal for use by aircraft personnel, police, and military officers.Features and Specifications: Fits flashlights with head diameter between 1.3"-1.4" (33-36 mm). Dimensions: Diameter: 1.44" Thickness: .82" Made of durable rubber Mineral-coated glass lens Not easily visible to deer and other animals. Won't interfere with night vision equipment. Fits: JetBeam Jet III M, RRT2 and PC25