Bradychan Clasp Clip Replacement Magnetic Silicone Strap for Fitbit Flex Wireless Activity Wristband Bracelet Sports Monitor Sleep Tracker (Black) clasp for Fitbit Flex replacement magnetic clip The magnet inside the clasp can firmly adsorb your Fitbit Flex Sports Activity Tracker Monitor Made of quality silicone material, Light and soft. Easy to install the device and easy to wear & clean Personalize your wristband to match your daily style with these clasp new color choices.