TruGlo TFX Pro Glock High Set Handgun Sights - Glowing bright both day and night, TFX Pro sights are always ready. TFX Pro takes the award-winning Tritium + Fiber-Optic technology even further with all the features the customers requested: compact snag-free design, longer sight radius, and amazingly durable construction built to handle just about anything. Illuminating elements are encased inside a virtually indestructible chemical and shock-resistant capsule and the CNC-machined steel is protected with a rust-resistant FORTRESS FINISH. Fully protected TFO technology encapsulated in a virtually indestructible capsule Impervious to oils, chemicals, cleaning solvents, and ultra-sonic cleaning processes Unmatched visibility in all shooting conditions 24/7 Assembled in USA with quality Swiss tritium for maximum brightness Glows in the dark - no batteries or light exposure required Front sight FOCUS*LOCK for fast and accurate shooting Concealed fiber cannot be seen by target FORTRESS FINISH nitride protective coating Fits standard holsters Patented Sealed Capsule Design - Provides maximum protection and durability. Compatible with: Glock 20, 21, 25, 29, 30, 31, 32, 37, 40, & 41 (Excludes M.O.S. models)