"This equipment is using for drain and disburse 5 - 50 microliter of solution volume by automatic system, the value show on digital display. Body structure made of material which harmless to the environment, light weight, model compact with handling. Drian and disburse button are on pipette's body and lock button for protect the error from user, which can disassembly and reconstruction. Comfortable to recalibration. The 2 O-rings at each tips act as to protect leakage of solutions"