Disposable Impression Trays are an impact-resistant plastic. The trays are rigid, distortion-free, and compatible with a wide variety of impression materials. The perforations are designed to enhance consistent flow and retention. Full & Partial Perforated Assorted: 12 of each Full 1-6 and Partial 7-10 Features and Benefits Distortion-free construction Anatomically designed Smooth edges for comfort Excellent retention for impression materials Disposable Perforated plastic trays Consistent Impressions Distortion Free Excellent Retention Size: IT-01 #1 Large Upper Size: IT-02 #2 Large Lower Size: IT-03 #3 Medium Upper Size: IT-04 #4 Medium Lower Size: IT-05 #5 Small Upper Size: IT-06 #6 Small Lower Size: IT-07 #7 Quadrant Ul/lr Size: IT-08 #8 Quadrant Ur/ll Size: IT-09 #9 Anterior Upper Size: IT-10 #10 Anterior Lower Pack: 12 pcs per bag