Easy-to-install, all steel, replacement sights fit right in the factory dovetail. White Dot model matches the Novak 3 Dot Glock Rear Sight. Blank model lets you change sight height to accommodate different shooting styles and ammunition. Can be easily trimmed with a file and touch-up blued. Mfg: Novak SPECS: Fits all models of Glock semi-auto pistols. Machined steel, blued. Available in Blank; .134"" (3.4mm) wide, .220"" (5.6mm) high. White Dot; .134"" wide, .185"" (4.7mm) high.