We have been handling the import and export of mineral and special equipment for many years. And we would like to recommend our main product, the high-grade pyrite lumps S45 to you. The quality and the size are as follows:Pyrite Lumps S45(FeS2)Quality:S: 45% minFe: 40% minSize:3-15mm; 10-30mm; 10-50mm; 10-80mm. If you want to know more details about our product, pls feel free to contact us. Tel:(+86)759 2284880Looking forward to hearing from you soon. Thanks and best regards.