Truglo3/8" Metal Dovetail Sights .343" Green Rifle Fiber Optic - Truglo's 3/8" Metal Dovetail sights are constructed from CNC-machined steel and have fiber diameter of .060". The listed height is measured from the bottom of the dovetail. The extreme brightness of the optic brings light on target into the lowest of light conditions and installs with ease.