YDM's net tray impression premium is made of stainless steel to prevent corrosion and discoloration after soaking in the tray cleaner and/or disinfectant solution. This one is used to create an impression of the upper full denture. It features a finger position to prevent the impression material to adhere onto the finger. It comes in three different sizes - 66x53mm, 70x55m and 73X60mm.