DENTAL STAINLESS STEEL PERFORATED IMPRESSION EDENTULOUS TRAYS AUTOCLAVABLE 10/SET These are 5 pairs of upper and lower perforated trays of extra small, small medium large and extra-large size. DENTAL STAINLESS STEEL PERFORATED IMPRESSION EDENTULOUS TRAYS AUTOCLAVABLE 10/SET Cynamed -German stainless steel perforated material that holds the impression material well. It is resistant to distort while removing from the mouth Margins are designed as rounded to avoid any injury on the gums.Easy to clean because of its highly polished surface Set Include -UPPER + LOWER X-SMALL , SMALL, MEDIUM, LARGE , X-LARGE ASIN B0842FJWFP Item Weight 15.8 ounces Manufacturer WSI Item model number IMP-011 Package Dimensions 10.55 x 7.64 x 2.05 inches