The RF1000 is a manual pipette controller and is uniquely designed for one-handed operation. Simply squeeze the main bulb and push the toggle forward to aspirate or back to dispense. Push the blowout bulb to expel any liquid remaining in the pipette.Tapered silicone pipette adapter allows a large range of pipette sizes and makes to be used. Replaceable when worn.Accepts common, and readily available replacement filters unlike other pipette aids whose filters are custom. This will help reduce total cost of ownership over time Includes a 0.45 μm filter and three nose cones, blue, green and white .Stay organized with two additional nose cones (green, white) for color identification.Overall dimensions 180 x 45 x 120 mm