Matte Black 55" Grate Assembly SquareThe grate assembly consists of a stainless steel frame that can be seamlessly adjusted to the thickness of the ceramic tile or stone covering 1 4" to 23 32" The standard grate assembly frame features a 3 8" wide reveal after installation. If placed at shower entrance, it is recommended that the drainage openings span the maximum width of the entrance to limit potential overflow; secondary drainage may be required in the drying area.