??? 12pcs silicone ring, other device not included. Assored Color Mix. ??? Inner diameter: 13mm, Outer diameter: 17mm, Height: 6 mm. Suitable for external diameter 14mm-25mm. ??? You can carry it as you like, by hand lanyard or on your key ring, different ways to protect you devices or take small things with you. ???100% High quality flexible medical grade silicone, heat resistance, strong, durable,flexible and comfortable. ??? Smart silicone bands can use for pendant on phone, keyring, pens, lanyards, USB flash disk and some similar devices.