Introducing the STD21Y-X, a durable snap-on cable marker designed for easy and efficient identification in high-reliability environments. Part of the Agastat 7000 series, this marker features a sleek black legend with the designation "X," making it ideal for organizing and labeling cables with precision. The straight marker cut ensures a secure fit on cables with a diameter of 11 to 15.5 mm (.433 to .61 in), offering versatility for various applications. Perfect for use in aerospace, defense, and other industries, the STD21Y-X is a must-have for maintaining organized and compliant cable labeling systems.