All stainless steel construction. The platform is installed in the air by hanging. The platform is made of stainless steel tread plate with a thickness of 2mm. The platform surface has a sinking groove that is connected to the user's floor drain. The hand washing/tool sterilizing device is mounted on the platform. Stainless steel is food grade 304. Countertop Size: 3500 x1200x2000mm (length x width x height). hanging.