i-smile 1PC Replacement Bands with Metal Clasps for Fitbit Flex / Wireless Activity Bracelet Sport Wristband / Fitbit Flex Bracelet Sport Arm Band (No tracker, Replacement Bands Only) & 1pc Black Silicon Fastener Ring Free size fit your wrist depend on button site you place. Comfortable for sporting time,Look good no matter what you are wearing Silicon Fastener Ring - designed specially for fitbit flex to protect the clasp loose and band fall off Personalize your wristband to match your daily style with this brand new color choices Free size wristband accessory ,High quality and Replacement for lost or damaged Bands.7 Days Unconditional Return Period NOTE:No Tracker or other parts! For Fitbit Flex Band only! Not for Fitbit one or other Models! Replacement Bands with Metal Clasps Only