This series of reagent bottles are made of soda-lime glass. It is clear and no graduation. It is ideal for liquid or powder. The ground glass stopper provide good air tigntness. The glass is lead free, and it is safe for food. Capacity Bottle OD Height Neck ID30ml OD 35mm, Height 74mm, Neck ID 25mm60ml OD 44mm, Height 90mm, Neck ID 30125ml OD 55mm, Height 110mm, Neck ID 35mm250ml OD 68mm, Height 130mm, Neck ID 40mm500ml OD 85mm, Height 165mm, Neck ID 50mm1000ml OD 105mm, Height 185mm, Neck ID 55mm2500ml OD 140mm, Height 290mm, Neck ID 80mm5000ml OD 175mm, Height 325mm, Neck ID 105mm10000ml / 10L OD 220mm, Height 425mm, Neck ID 105mm20000ml / 20L OD 274mm, Height 535mm, Neck ID 120mm