Spacer Tray 12/Pk Perforated Medium Upper #4D by GC America SKU 970-1734AA 123 $11.99 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Sold out #4D Medium Green Perforated Upper Full-Arch Plastic Impression Tray, Zig-Zag Design, Package of 12 Trays.