We produce and sell single- and dual-frequency stabilized He-Ne lasers. Dual-frequency lasers with Zeeman frequency splitting and wide range of the difference frequency values (from 1.5 MHz to 4.5 MHz) of the optical emission components. High stability of emission frequency is provided by active and passive methods of stabilization. Linear and orthogonal emission polarizations provide for the wide opportunities of the application in control-measurement systems with the highest accuracy.