Transparent Clear Silicone Mold for Creating a Ball or sphere 23 Sizes from 7mm to 30mm (Ball diameter 30mm) 23 sizes you can choose to make a ball Transparent Mold, you can see where your inclusions are, so you can place them exactly where you want them Flexible for easy casting removal Durable and reusable, at least 100 times Item in USA, Ready to ship in 1 business day.