HopCentury Multi-color Silicone Fastener Ring for Fitbit Flex / Garmin Vivofit / Samsung Galaxy Gear Fit / Fitbit Charge HR Wristband - 10 Pack 10 pack multi-color silicone fastener rings for Fitbit Charge HR wristband only Keep the wristband away from unfastening accidently A small and helpful security device for your activity tracker Silicone rings only without tracker and other parts Large size for Fitbit Charge HR wristbands