Brunton O.S.S. 50M Mirrored Compass Brunton Product Includes compass Great for camping We've also added a meridian insert, so that you still have Brunton's patented tool free declination system, but the meridian lines stay down on the map for greater ease and more precise headings. BRUNTON O.S.S. alignment system Tool free declination adjustment Dimensions: 2.9"x3.9"x0.8" Made in the USA