The Dual Syringe Dispenser Valve is compatible with the ML504 and ML540 instruments. A slightly modified version of this valve is compatible with the ML560 instrument. The valve has an aluminum housing with two PTFE-rotary plugs. Rotation of the left plug connects the left syringe to the input and output. Rotation of the right plug connects the right syringe to the input and output. This enables the instrument to dispense two unique solutions without the chance of mixing between the solutions.