Vapor Lightweight Scope Level attaches directly onto your scope tube to keep the scope reticle consistently level. Keeping the scope reticle consistently level is critical as target distances increase. Warne’s new Vapor Lightweight Scope Level allows shooters to easily keep the reticle level without changing their position on the rifle. Easily attaches to your scope tube for right or left-hand configurations. – Our recommended installation is in front of your turret assembly on the weak-eye side; in this configuration the bubble seems to float near your reticle when used with both eyes open. – Easy to install – Field proven performance – Lightweight aluminum – Lifetime warranty – Designed and Made in USA – Finish Color: Matte Black – Weight: .68 oz – Material: Aluminum – Scope Tube Diameter: 30mm – Fits: 30mm scope tubes