ECSEM Replacement Silicon Fastener Ring Connector Security Loop for Fitbit Charge HR Wireless Activity Wristband ONLY(10, Black) This silicone rings fit for Fitbit Charge HR Wireless Activity Wristband Only Anti-slip design.This watch band Keeper fasteners design is Anti-slip, Can be well inserted into the buckle hole of the strap, not easy to fall off. (Tracker or Wristband is NOT included) Package is only include silicone rings, not include the band and tracker. The rings are simple and very easy to use. Save your money to buy a new fitbit hr Comfortable wearing experience and perfect fit the Fitbit Charge HR Wireless Activity Wristband very well Package: 10 x black band keeper replacement fitbit charge hr safe rings silicon fastener rin connect security loops