MDW Silicon Fastener Ring for Fitbit Alta / Flex/Vivosmart (21 Pack Mixed Color)-Secure Your Wristband in Style ! specially designed fastener for Fitbit Alta / Fitbit Flex/Garmin Vivosmart keep the band from falling off, secure your loved wristband in style fit perfectly, durable fun color including 21 pcs mixed color silicon fasteners ONLY, NOT include the band !