The Selmer CL311 composite Bb clarinet features a .573" reamed bore, a handsome wood-like finish, undercut tone holes, and silver-plated keys. It includes an 4201 hard rubber mouthpiece and a case.

The internal bore design of the Selmer CL Series clarinets compares to many professional handmade clarinets. The use of carefully located tapers (conical) and straight (cylindrical) sections creates a smooth, consistent scale. Selmer CL Series clarinets enable musicians of all ages and abilities to produce a refined, resonant tone quality.
The shape of the Selmer CL311 clarinet bore results in an instrument in tune with itself. Play a low G, add the register key to produce the D a twelfth above and check the pitch of both notes; they should register as in tune. Do the same with low A and middle E, low Bb and middle F, low Bn and middle F#. Critical undercutting of the tone holes refines this tuning process and enhances a full, even sound over the entire range.

The Selmer CL Series makes playing the clarinet effortless. Key placement and size becomes very critical for young musicians. Small fingers can easily cover the profile and size of the CL311's ring keys. Ergonomic positioning of the left-hand little finger keys and throat A facilitates advanced technique. An adjustable right-hand thumb rest on the CL311 allows for a personalized feel. Use of professional-style tapered pivot screws on all Selmer clarinets lends a light, positive action.