REDLAND 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, REDLAND Impression trays offer a system of holes and perforations to optimize flow and retention of materials. Features and Benefits: Perforated, Disposable, pre-shaped trays can be easily trimmed or flame softened to adjust for a custom fit, Non-slip grips offer easy, clean removal.