This silicone mould for casting crystal resin with 6 different balls is reusable for pouring resin that imitates glass. The casting from the mould makes a lovely resin or stone-effect piece of jewellery, or a decoration. To extend the mould's lifespan, we recommend applying a release agent to it before pouring. The resulting balls measure 12, 14, 16, 18, 20 and 25 mm.