Add your own unique flourish to on-the-go accessories with this set of ceramic car coasters from Make Market. Made with a special polyester coating for use with sublimation inks, embellish these blanks with cheerful designs perfect for handcrafted gifts or use in your own vehicle. Details: Unfinished white 2.5" (6.4 cm) coaster diameter 4 coasters Single side sublimation only Ceramic with polyester coating Sublimation Instructions:Pre-heat to 356°F (180°C) and press for 120 seconds. Do not exceed 400°F (204°C).Always reference manufacturer's instructions for recommended use, time and temperatures for each heating machine, as they could vary. Surface will be hot. Use protection when handling the finished product.