degree angle buble level indicator angle with precision cosine fit 25.4mm and 30mm left side mo

100% cnc machined with aircraft aluminum alloy fits common scopes with 30mm and 1" diameter scope tubes a number will be displayed,when the needle moves with your ,that indicates the percent your is off level with angle indicator and scope level helps your long range precision shooting the bubble level also allows you to have an additional indicator to achieve much higher accuracy