With OPTIFIX BASIC, aqueous solutions, acids and crystallizing media can be dosed safely. As there are no metal springs used in the OPTIFIX dispenser, liquid samples will not be contaminated. By using a glass cylinder one can clearly see the liquid as it is being dosed. To avoid mistakes, the finger caps are labeled in different colours. The BASIC dispenser is in blue. The OPTIFIX BASIC Dispenser is offered in nine sizes from 0.4 ml to 500 ml with a corresponding range of bottle top adaptors. This allows a wide range of volumes to be dispensed safely and accurately directly from storage bottles