Coaster Round 4" diameter x .06" (1.5mm) DyeTrans Rubber Round Coaster, White Sublimation Top with Black Rubber, 4" diameter x .06" (1.5mm). Showcase your artwork or advertise to prospects in a very unique way. White Polyester with Open Cell Black Rubber Backing I purchased this from Conde Systems (IYKYK - great company). They are DyeTrans coasters, the best of the best. I no longer produce my artwork and these are what I have left over from my new sublimation stock. I have included the original invoice with my information blacked out.