This dial is for use with our tide only movement. Choose from 4-1/4″ or 6-7/8″ diameters. The 4-1/4″ dial is made of styrene (plastic) and is a bright white with black Arabic numbers. There is a nice lighthouse scene in the center. The 6-7/8″ dial is made of metal and is a bright white with black Arabic numbers. Both dials tell the high and low tides base on the lunar day of 24 hours, 50 minutes.