Dental Impression Tray, Solid / Non-Perforated, Lower Arch, Size 5 is mandibular tray features a distinctive open U-shape design engineered to comfortably fit around the tongue. The smooth, non-perforated stainless steel walls rely entirely on a rolled rim-lock border to mechanically anchor alginate or silicone materials. The stamped number "5" on the flat thumb handle denotes an Extra-Large (XL) adult size profile.