Rainbow A Cyan D D red is a CBS premium dichroic coating. This coating is applied to Uroboros COE 96 colored glass Straw. Rainbow A fires to natural rainbow colors in 1 inch stripes. The colored glass shows through between the rainbow stripes. This glass is coated specially for Dichroic, Inc. This coating is offered in 4x4 inch squares only. Please Note: Photos of this glass show mostly transmitted colors of the coating rather than the reflective colors.