... Character Low Ca , acid-resistant, non-fading Color Black, Green, Blue-black, Rusty yellow or any your need Sizes Low Ca ... slab, granite slate, marble slate, slate flooring tile, black slate, black slate slab, black slate tile, natural slate, roofing slate, wall slate, ... for compatible dimensions) complete with pre-drilled, countersunk nail holes for longest slate roof life. We manufacture slate stone ...