Specification Brand : Dntum BulletPoint1 : High Purity:99.999999999% purity element simple substance. Great for element collections, hobbies, DIY, experiments, material display. BulletPoint2 : Beautiful Looks: Almost no bubbles, transparent, self-made, polished and polished by hand BulletPoint3 : Accuracy: Resin thickness is about 8~10mm, side length is 30*30mm BulletPoint4 : package:High-vacuum sealed packaging to ensure that the metal is not contaminated and oxidized. Element collections, gifts, science teaching aids, exhibitions BulletPoint5 : Service:We attach great importance to customer experience, so you can contact us if you have any questions, and we will get back to you within 24 hours! ExternallyAssignedProductIdentifier : 7071545112032 ItemName : Resin cast monocrystalline Silicon for Element Collection Lab Experiment Material Hobbies DIY ItemTypeKeyword : specialty-non-ferrous-metals-raw-materials Manufacturer : Dntum MetalType : other PartNumber : SYMXZJ0076400 ProductDescription : Tips: