These graduated laboratory bottles are chemically resistant and stable. Supplied with or without red PTFE-lined PBT cap and a removable pouring ring that allows for drip-free operations. Safety coated for protection against mechanical damage and to prevent leakage of contents should the glass break. For use up to 135°C. Not suitable for vacuum or pressure use. Can be hot air sterilized or autoclaved. Fabricated from borosilicate glass.