Austerke 12Pcs Replacement Bands for Fitbit Flex Wristband (12PCS Bands, Large) Silicon Fastener Ring For Free - designed specially for fitbit flex to protect the clasp loose and band fall off. Easy install without any tools Free Size with 3 Types of Groups. Personalize your daily style with this brand new color choices.Good for your workout or daily activities Note: No Tracker or other parts! Only Made of Comfortable, Durable and Waterproof Materials, Not easy to be damaged PACKAGE: Set of 12 x Replacement Bands for Fitbit FLEX,12 Metal Clasp?,1 x Austrake Packaging WARRANTY: 1 Year Warranty and Quality Assurance. Please Contact Us for Any Quality Issue. Do Not Need Return for Replacement or Refund.