Diamond SureFlo™ Bottle Top Dispenser allows for precise and easy dispensing of laboratory reagents with an ergonomic design. These Bottle Top Dispensers make dispensing simple and efficient. A unique piston design allows for cleaning and servicing without calibration change. The chemically-resistant springless valve offers higher reliability with less maintenance. All models feature dual graduations, volume lock and four additional bottle thread adapters. Its locking feature prevents spills and can be calibrated with a single tool. Recirculating versions prime without loss of valuable reagents.