Perforated Disposable Impression Trays Each Bag has 12 Trays of 1 size. Available Models: CRYSTAL™ Disposable Impression Trays – Crystal Color, 12/Bag -12 Sizes EURO Impression Trays AUTOCLAVABLE TO 275°F – Multi Color, 12/Bag -10 Sizes DULOCK™ Impression Trays, 12/Bag – Apple Green Color, 12/Bag -10 Sizes Safedent Blue Impression Trays – Blue, 12/Bag – 12 /Sizes Mini Impression Trays – 25/Bag, Yellow/White Sizes: #1 Upper-Large #2 Lower-Large #3 Upper-Medium #4 Lower-Medium #5 Upper-Small #6 Lower-Small #7 Upper Left-Lower Right #8 Upper Right -Lower Left #9 Anterior-Upper #10 Anterior-Lower X1 – X-Large Upper X2 – X-Large Lower