Use by dentists for oral treatment. ​Don't use if it is contaminated, with spikes, or cracked,. ​Sterilized or autoclaved before use. ​ ​Instructions ​Firstly, before filling, put matrix bands with retainer around the hole, and choose suitable size wedge, insert from buccal to lingual, keep matrix bands close to the neck of the tooth to prevent overhang. ​Storage: Avoid to be exposed to the sun and to place them with corrosive items. ​ ​Package Included:210PCS