Glowing bright both day and night, TFX Pro sights are always ready. TFX Pro takes their award-winning Tritium + Fiber-Optic technology even further with all the features their 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. Please note that items TG13BR1PC and TG13SJ1PC are front sights only.Features :Fully protected TFO technology encapsulated in a virtually indestructible capsuleImpervious to oils, chemicals, cleaning solvents, and ultra-sonic cleaning processesUnmatched visibility in all shooting conditions 24/7Assembled in USA with quality Swiss tritium for maximum brightness