Bel-Art Economy Pipette Pump III 10ml Pipettor; Green (F37902-0010) Ergonomic,lightweight design for one-handed operation Optimally located manual thumb wheel rotates easily for precision aspirating or dispensing drop by drop Thumb wheel can be used to blow out contents of pipette 10mL volume Resistant to acids, alkalis and most solvents; can be disassembled to clean