Wolf Forte Secondo, Violin Shoulder Rest. 4/4 and 3/4 size. Rubber padded, ergonomically curved bar. Height and pitch adjustable with screw-on swiveling legs. Height adjustable from 1 to 3-1/4. Sliding width adjustment on one end.
For the video on how to shape this shoulder rest to a "Magic Posture" copy and paste the below link in your browser.