Total 2kitPacking List:4pcs/kit,1kit=UR+UL+LR+LLAvailable Size:#32-#41Advantages:1.Medium softness, adjustabla shape for pefect teeth fitting.2.Triple polishing and cleaning, molar bands are obviously more shine.3.High quality molar bands with ''rolled edges'', manufacturered by top professional factory.4.Unique Profile(Shape&Height) of the bands for patient comfort, comparing to AO master bands.5.Laser ID marking for easy identification, inner micro etching for ensuring bonding strength.Introduction: The gap retainer is a device that is made to maintain the gap after the tooth is lost prematurely.,It is a device that maintains a normal physiological gap and prevents the adjacent teeth from tilting to the lost part and the opposite jaw teeth from elongating. It is used to maintain the mesio-distal and vertical gaps between the premature lost teeth in the dentition and maintain the normal eruption of inherited permanent teeth.