1.RESIN COASTER SET: Includes 4 x Square silicone coaster molds of Diameter 3.54''x thickness 0.4'' (9cm x 1cm), and 1 pcs coaster storage box mold of 4.1'' x 2.8 ''x1.61'' (10.5cm x 7.1cm x 4.1cm). A good choice of resin kit. 2.SIMPLE TO USE: Ingsi silicone resin mold is smooth and clear, easy to unmold and barely requires polishing. Simply add resin and other resin decor into the mold, then push the other side of the mold and resin comes out smoothly when it's cured. Please refer the detailed steps in product description. 3.MATERIAL & QUALITY: The silicone molds are made of durable silicone, very flexible, easy to demold and recyclable. These resin casting molds help keep the resin product in precise, transparent, smooth and mirror shine surface. 4.DIY PERSONLIZED : You can customize your pen holder with various ideas and options like color, pattern, name or word on the mold. It can be used as a special and unique gift to your lovers and friends. Enjoy your game time! 5.IMPORTANT NOTICE: 1) The coaster molds set are suitable for casting resin only, not for coating resin. 2) Do not use torch or heat gun to pop bubbles while resin in the molds, cause it will damage the silicone molds for sure