Vision Industries 1750 sash vent stop, designed for use on tilting and non-tilting double hung and horizontal sliding windows.
The 1750 vent stop has a low profile housing for shallow pocket installations.  It features a convenient slide-button actuator and snap-in barbs that accommodate vinyl thicknesses from 0.059” to 0.071”.  1750 is made by the same company that provides Window Hardware attached to the most popular brand Windows and Doors sold at Home Depot, Lowe's and many other window and door outlets.