SubliSLATE™ Coaster, 4" Round. Excellent bundle item with matching slate plaques. White Matte. Smooth, machined sublimatable slate, each with unique fractured edges. Excellent bundle item with matching slate plaques. Slate can vary in size by up to -0.4". Production for slate requires the use of a green rubber pad, 1/8" thick and at least an inch larger than the plaque. Sold separately.