Super Scope Dual Lens with a 4 power 0.375 center lens size. The lens gives you two different views. The base lens is our standard 2 power Excalibur Tuff Lens. Both parts of the lens are optically centered, which is a very important factor when picking a lens to shoot in a scope. The Dual Lens allows you to magnify just the X ring or the very spot you are shooting at, and also gives some magnification to the rest of your target. The Super Scope lens measures 1.125" (approximately 1 1/8"). For 040-2 and 040-2BLK Scopes. Filed of view includes the entire X-ring line and very thin sliver of the 5 ring on NFAA targets and the entire 10 ring and very thin sliver of the 9 ring on Vegas targets. For 040-2 and 040-2BLK Scopes.