The Vickers Elite Glock Sight is a fiber optic, snag free front sight for Glock 9/.40 models. The Vickers Elite Glock Sight set requires the use of a 0.245 tall front sight for all caliber Glock pistols except for .45 ACP and 10mm which will typically require the 0.230 front sight. These front sights are taller than factory Glock and not compatible with standard factory rear sights without adjusting the sight height. Front Sight Height: 0.245". Front Sight Width: 0.125". Fiber Diameter: 0.0585".