Room Numbers & Directional Plates Seawave Line Raised letters & numbers give a luxury appearance. The room numbers can be fitted additionally with a raised Braille system Mirror Line Elegant design with inlay letters and numbers. The mirror color can be also silver mirror and for the background color we have several options. Gravo Line Cost efficient line available in many color combinations. Room-Number Plates Besides our main lines, we have nearly unlimited capabilities to produce our customers’ designs.