⚠️ This item originally contained 15 pieces, but 2 have been used, so 13 pieces remain for sale. Please be aware of this before purchasing. This product protects the ball chain connectors of keychains, charms, etc., preventing them from falling off. Material: Silicone rubber Size: Body length approx. 2cm, outer diameter approx. 3.8mm *Shipping via regular mail is planned. Oshi-katsu (Supporting your favorite idol/character) Drop prevention