Material: Silica gel Standard: Pharmaceutical grade Optional weight: 0.5g/ 1g/ 2g/3g/5g Size: 20x36 mm(0.5g) 20x40 mm(1g) 20x55 mm(2g) Packing material: Tyvek paper Printing: English Packaging: 15000PCS/12500PCS/7500PCS/5000PCS/3000PCS