MINI BUBBLE LEVEL  5mm x12mm for rifle and scope alignment.
These miniature bubble levels are a useful addition to any target rifle.
Aids in aligning the scope and mounts.
Enhances accurate shooting by helping to prevent canting of the rifle.
Glue them in place on scope mounts & rifle stocks.
They fit inside the slots of a picatinny rail.
Hold in place with a small amount of clear silicone adhesive (not supplied).
Extremely light weight, only 0.25 grams. 
Made from high strength acrylic.
 Sold in a pack of 5 levels.
FREE shipping on these levels if you buy this together with other items