15 Bridges for musical instruments; Capos; Collapsible guitar stand and seat combination; Guitar playing assistance devices, namely, a sliding clamp-like structure positioned onto the guitar neck to form and sound guitar chords and notes; Guitars; Mouthpieces for musical instruments; Musical instrument tuning apparatus, namely, machine heads, tuning hammers, tuning keys; Musical instruments; Picks for stringed instruments; Replacement parts and fittings for musical instruments; Shoulder rests for musical instruments, namely, violins, violas; Strings for musical instruments; Strings for western musical instruments; Tuners for musical instruments; Tuning apparatus for musical instruments