Handmade rock wool cleanroom sandwich panel with four-side reinforced metal keel for modular installation. Rock wool core density 80-120 kg/m3; panel thickness 50/75/100mm (customizable); module widths 980/1160/1180/1200mm. Face sheets 0.4-0.8mm pre-painted steel, stainless steel or functional coated sheet. Surface coatings: PE, HDP, PVDF, antistatic, antibacterial and conductive. Suitable for pharmaceutical clean rooms, laboratories, medical-device workshops and fire-conscious partitions. Manufactured by SHANDONG HIHSTEEL CO., LTD.