Moulded, crystal clear, top made of polycarbonate and bottom made out of chemical resistant polypropylene. Grease is required on the flanges to make the dessicator airtight. (LSE) Laboratory Equipment Exporters & Instruments Manufacturers, Moulded, crystal clear, top made of polycarbonate and bottom made out of chemical resistant polypropylene. Grease is required on the flanges to make the dessicator airtight. (LSE), Moulded, crystal clear, top made of polycarbonate and bottom made out of chemical resistant polypropylene. Grease is required on the flanges to make the dessicator airtight. (LSE) Lab Instruments India