PRODUCT DETAIL : SET OF 6 Pcs Dental Autoclavable Metal Impression Trays Stainless Steel Small, Medium, Large -Upper and Lower UPPER AND LOWER SMALL 1 UPPER, SMALL 1 LOWER, MEDIUM 1 UPPER, MEDIUM 1 LOWER, LARGE 1 UPPER, LARGE 1 LOWER German Stainless Steel Impression Trays have long been the first choice of most schools and dentists worldwide. These trays are available in many different sizes, shapes and types including full or partial, solid or perforated, and pediatric. When poured and mounted on the articulator, Check Bite Impressions produce a pair of contemporary, separable models in true occlusal relationship.