Tritium night sights transition from standard white dot sights during the daylight, to glowing green dots in the dark. Tritium does not need batteries. Fits most standard holsters. Front sight FOCUSLOCK ring for even faster focus. Fits most standard holsters. 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.
Specifications:

Type	Front/Rear Set
Frame Material	Steel
Frame Color	Black
Firearm Fit	Glock 20/21/25/28/29/30/31/32/37/40/41
Base Configuration
Style	Square
Front Material	Tritium
Rear Material	Tritium
Front Color	Green
Rear Color	Green
Rail Size
Windage Adjustment
Elevation Adjustment
Fiber Diameter
Firearm Type	Pistol