Sonata in D for Two Flutes and Piano, KV448
This arrangement of a sonata for two pianos (K448) is welcome because there is a paucity of classical repertoire for this combination. The movements are the standard fast slow fast and the writing is intricate with an important piano part. This is a very successful working of an attractive piece and you will be play it frequently I'm sure.
Difficulty level, roughly compared to ABRSM exam grades. 0 is beginner, 9 is advanced (beyond grade 8).