The Rite in the Rain No. 9130 MIL Zeroing Target is a weatherproof and durable target made to endure harsh weather and to precisely calibrate optics graduated in milliradians. Each line corresponds with a 1/10 MIL adjustment at 25M. When this target is posted at the intended distance, you can easily interpret the average error of your group to derive a precise adjustment to apply to your optic to quickly and accurately zero in. Rite in the Rain's 100# paper stock endures moisture and creates clean exit holes. Keep sharp year-round, no matter the weather with Rite in the Rain targets.