Borosil Bottle Top Dispensers offer accurate dispensing with enhanced safety and DIY calibration. They are also Fully Autoclavable, easy to recalibrate and offer convenient QR code based compatability for all users. For models with a recirculation valve, please see our Pinnacle range of bottle top dispensers. Features: DIY – Calibration Ring: - Convenient Recalibration by users. No need for expensive third party calibration after dismantling or autoclaving. - Users can easily reset the calibration using the built in tool and position marker. Wide Range of Adapters - 28, 32, 36, 38, 40, 45 mm bottle top adaptors Suitable to mount on different reagent bottles. All included as standard. Construction - Wipe out Piston, Borosilicate Glass, FEP, PTFE PFA offers high .