The ONN Replacement Band Metal Buckle for Fitbit Flex in Purple is a durable and stylish accessory designed specifically for gym and training activities. The adjustable size and secure metal buckle closure ensure a comfortable and personalized fit for most users. Made by the trusted brand ONN, this replacement band is a practical and high-quality choice for those looking to upgrade or customize their Fitbit Flex smartwatch. Fits wrist 5.5 to 8.25 inches.