Even with the highest quality rifle scope improper positioning can lead to inaccuracy when you fire. One of the mistakes that is the hardest to break is canting or tilting the gun to the left or the right. This Spirit Level for 30mm Rifle Scope Mount Rings Sights is designed to help you overcome this problem. The green liquid inside works like a carpenter's level and will be centered between the lines when the rifle is completely level. Crafted out of heavy-duty aluminum the part is a high quality accessory and it comes with all of the hardware needed to add it to a rifle. Normal 0 7.8 ? 0 2 false false false EN-US ZH-CN X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:????; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri""sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} - Color: Black Case + Green Liquid - Aluminum alloy material - Use this spirit level to get the shot on target - Comes with mounting accessories