Dear Value Customer!Thank you for your attention towards our products. We have the information state below intended for the broker and manufacturer:1/ Natural gypsum: CaSO4.2H2O with 95% purity (min).+ Sizes: 0-5mm; 5-10mm; 10-20mm; 20-30mm.+ Free moisture: 3% (max).+ Combined water: 19% (min).+ CaO: 30% (min).+ SO3: 43% (min).+ Inspection reports (SGS, VinaControl).+ Specification: in bulk.2/ Coal:A/ Pieces:+ Sizes: 15-35mm.+ Calorific value: 7,450 KCal/kg.+ Ash: 6.01-12.0%.+ Total moisture: 3.5%.+ Volatile matter: 6%.+ Total Sulphur: 0.6%.+ Inspection reports (SGS, VinaControl).+ Specification: in bulk.B/ Dust:+ Sizes: 1-15mm.+ Calorific value: 6,050 KCal/kg.+ Ash: 22.01-26.0%.+ Total moisture: 8.0%.+ Volatile matter: 6.5%.+ Total Sulphur: 0.6%.+ Inspection reports (SGS, VinaControl).