DEFEND Impression Trays are made of a strong, rigid material that aids in the generation of consistent, distortion-free impressions.  Compatible with a wide range of impression materials, DEFEND impression trays offer a system of holes and perforations to optimize flow and retention of materials.  The disposable, preshaped trays can be easily trimmed or flame softened to adjust for a custom fit.  Non-slip grips offer easy, clean removal.  12 trays per bag.