A floor drain with dimensions of 80x80mm is a drain that has a rectangular opening with a width of 80mm and a length of 80mm. The term "satin" in this context likely refers to the finish of the drain, which is a type of smooth, matte finish that is commonly used on metal surfaces. It is typically achieved through a process called satin finishing, which involves sanding the surface with fine grit abrasive to remove any roughness or imperfections, and then polishing it to create a smooth, lustrous finish. Satin finishes are often used on floor drains and other plumbing fixtures because they are easy to clean and maintain, and they have a modern, sleek appearance.