An anti-tussive nebulized solution for targeted delivery of lidocaine into conducting and central airways. Each of the separators includes a plurality of circular disks. Both portions are housed within a mat frame and exposed to a user through cutouts in the mat’s upper surface. The cutting insert is divided into four imaginary quadrants about its central axis and the four abutment zones are located entirely in two of the four imaginary quadrants, and for each index position, three of the four abutment zones are in clamping contact with the three reaction zones.