The better you can see your sights, the better you can shoot. We brought fiber-optics to the shooting sports industry decades ago for this very reason. TFO pairs our fiber-optic sights with our tritium night sights to create a consistently bright sight picture day or night. Snag resistant design, fits standard holsters. Fiber Diameter: 0.060″. Front Sight Length: 1.0″. Front Sight Width: 1.0″. Front Sight Height: 1.0″ Rear Sight Length: 1.0″. Rear Sight Width: 1.0″ Rear Sight Height: 1.0″. Compatible w/Glock 20/21/25/29/30/31/32/37/40/41 Except MOS.