Boron Silicide, Powder -400 mesh, 98+% (Metals Basis), 10gFor Research & DevelopmentNot for drug, human, animal, or food useCertificate of Analysis:Appearance (Color) Black Appearance (Form) PowderAssay (Metals Basis) 98+%Particle Size -400 meshCAS: 12008-29-6FORMULA: B6Si This item will be shipped in accordance with FedEx/UPS carriers, per DOT 49CFR regulations, which will meet or exceed all of USPS regulations per 49CFR 172.101, published in Federal Register 10742. Note: eBay please do not delist.