Glowing bright both day and night, TFXA(R) Pro sights are always ready. TFX Pro takes our award-winning Tritium + Fiber-Optic technology even further with all the features our 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(TM). Fully protected TFOA(R) technology encapsulated in a virtually indestructible capsule Impervious to oils, chemicals, cleaning solvents, and ultra-sonic cleaning processes Mfg: Truglo