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 ID 30ml OD 35mm, Height 74mm, Neck ID 25mm 60ml OD 44mm, Height 90mm, Neck ID 30