Check the listing for details. Dental Teeth Braces Preformed Space Maintainer Retainer Molar Bands #32-#41. Condition: New. Listed at 8.09 USD. Packing List:4pcs/kit,1kit=UR+UL+LR+LL Available Size:#32-#41 Advantages: 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. FDA STATEMENT The sale of this item may be subject to regulation by the U.S. Food and Drug Administration and state and local regulatory agencies. If so, you can bid on this item only if you are an authorized purchaser. If the item is subject to FDA regulation, I will verify your status as an authorized purchaser of this item before shipping of the item.