These molds are made of silicone and are very flexible, which means they don't need a releasing agent and your finished piece just comes out very easily and with the use of minimal force. The molds can be used for a variety of Resins. Size: 3 tiers of size 24 by 24 cm, 20 by 20 cm and 15 by 15 cm in diameter The pack contains 3 moulds as shown in image and NOTHING else included