Weber wrote two clarinet concertos, Clarinet Concerto No. 1 in F minor and Clarinet Concerto No. 2 in E-flat major.

The most famous clarinet works are the Mozart Clarinet Concerto and all the Weber Concertos.

Only one concerto. K. 622.

He did not write the following types of concertos: viola, double bass, oboe, flute, clarinet, harp, and many more instruments.

The only concertos that he has written are: Bassoon Concerto, Piano Concerto, Violin Concerto, Cello Concerto.

Not at all! It was written for a bassettclarinett, a combination between bassetthorn and clarinette, and also nowadays now and then played on that instrument. It was written for the virtuoso Anton Stadler (for whom Mozart also wrote the Clarinett Quintet and the Kegelstatt-trio).