Gem Bids For Spiral, Spiral Phase Plate Wavelength Nm 1030Nm, Topologicalcharge 1, Spiral Phase Plate Wavelength Nm 1030Nm, Topological Charge 2, Spiral Phaseplate Wavelength Nm 1030Nm, Topological Charge 3, Spiral Phase Plate Wavelength Nm 515Nm, Topologicalcharge 1, Spiral Phase Plate Wavelength Nm 515Nm, Topological Charge 2, Spiral Phaseplate Wavelength Nm 515Nm, Topological Charge 3