The HEXMAG HEXID Green Color Identification System provides a patented solution for safely and efficiently identifying ammunition types and calibers. This 4-pack kit includes matching follower and latch plate pairs made from durable polymer construction with anti-tilt followers for reliable performance.HEXMAG HEXID Green Magazine Follower & Latch Plate Kit (4-Pack)Patented color coded ammunition identification systemTool-less installation - change out in under 1 minuteAnti-tilt followers for smooth magazine operationMatching latch plate and follower pairs includedStrong polymer construction for durabilityEasy to see base plate color for quick identificationPerfect for shooters who need to quickly categorize and identify different caliber magazines ensuring safe and efficient ammunition management at the range or in the field.