At HEXMAG®, we understand just how important it is to safely, quickly, and efficiently identify ammunition type and calibers, which is why we pioneered HEXID®, the first-ever color coded ammunition identification system. This patented color identification system provides a means to quickly identify magazines, type and/or calibers of ammo in each magazine.  Each piece is molded from a strong polymer and includes matching pairs.  Anti-tilt followers are standard in each pack.