Burette 25ml Acrylic Clear 0.1mm Grad with TPX/PTFE Stopcock. Burette Acrylic Clear  25x0.1mm: PH range 1 to 14 is ideal. • Transparent acrylic body • Leakproof stopcock fitted with a self-lubricating PTFE plug with O rings • Graduations: 0.1ml • Individually calibrated for maximum accuracy • Resistant to most chemicals (except Hydrofluoric Acid and Ammonium Hydroxide) • Made of Polymethylmethacrylate (Acrylic)50ml