• The mould is made of more environmentally friendly silicone material with highly transparent appearance and high tear resistance, which makes it very easy to release the mould without deformation; the mould is treated with mirror process, the finished product does not need polishing, the surface is very smooth, shiny and without micro bubbles, helping you to easily make crystal towers with clear lines and perfect tips.
  
• Vertebrae moulds can be used not only for resin casting, but also for plaster, candles and other casting materials. You can add some resin pigments, resin dyes, mica powder, as well as embed different kinds of decorations or fillers, such as dried flowers. DIY an unique decorations for home and office, can be also presented as a specials gifts to your family's and friends on Mother's Day / Father's Day / Housewarming / Anniversaries / Birthdays / Valentines Day / Christmas etc.
• Silicone moulds are compatible with a wide range of casting materials, especially suitable for epoxy and casting resins, not for coating resins. It is also highly recommended to avoid using torches/heaters directly on resin moulds, as torches or heat guns can eventually damage silicone moulds or shorten their shelf life.
• The moulds are made of high-quality silicone material, very flexible and durable. You can use the silicone mould for a long time.
• Completely clean inside before use.

Here is the Mini Instruction.