DescriptionCommodity Quality Certification : ceMaterial : PlasticThis product may be intended for use by a health care professional use only. The seller may ask you to evidence you are a qualified health care professional entitled to buy and use such products in your country.Product Structure & Application Range:This product consists of wedge-shaped tip and hole-shaped end, made of plastic. Used to firm matrix band, and prevent dental filling materials from forming overhangs and damaging periodontal tissue.Attentions:Use by dentists for oral treatment.Don't use if it is contaminated, with spikes, or cracked,.Sterilized or autoclaved before use.InstructionsFirstly, 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.Packing:40pcs/box