The easy-to-use Proline® Prospenser bottle-top dispensers deliver trouble-free and reliable dispensing of liquids including strong acids, bases and solvents - directly from a supply bottle. The bottle-top dispensers are fully autoclavable and easy to dismantle for cleaning and maintenance. All models are fitted with an anti-drip closure cap, which guards against drips, when the bottle-top dispensers are not in use. Wide range of adapters are included to fit most common bottle sizes. The easy-to-use Prospenser bottle-top dispensers and Biotrate digital burette deliver trouble-free and reliable dispensing of liquids including strong acids, bases and solvents - directly from a supply bottle. All models are fitted with an anti-drip safety valve or a closure cap, a feature which guards against drips, when the bottle-top dispensers are not in use. A fine adjustment mechanism allows for even greater reproducibility for repeat dispensing.