[Set of Large Medium Small 3D Skull Silicone ]: Comes in a size to fit all your resin needs! These skull are good for making goth gothic resin craft for home Halloween Decoration. [Eco-friendly Flexible CLEAR Silicone ]: These skull are made from premium transparent silicone. Crystal clear silicone lets you see exactly what you're doing as you're working. The finished pieces are more shiny glossy than others made by HDPE white . Clear silicone are also more flexible, durable, easy to demold, not easy to be ripped. [Application]: These skull silicone casting are compatible with most casting material such as epoxy resin, UV resin, candles, wax, concret clay etc. [3D Sphere Resin without Trancation]: Easy set up - no tape or screws necessary. Just mix your casting material and pour, you will get a complete seamless resin sphere. There's no ring around the middle like some of those other spheres, no more sanding/polishing your finished piece! Material: Silica gel colour: Transparent Package Contents: 3 x skull (large, medium and small) 7 x high-transparency sphere (100/80/60/50/40/30/20mm) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.