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. Model ： Extra Small: 1.2x1.4x15mm Small: 1.5x1.3x15mm Medium: 1.5x1.5x15mm Large: 2.0x2.3x15mm Deep: 2.0x2.3x15mm Extra Medium: 1.5x1.8x18mm Extra Large: 2.0x2.3x18mm Material:medecial plastic Quantity:1 Box ，40 pcs Storage: Avoid to be exposed to the sun and to place them with corrosive items. Diamond Shape 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. |