Yamaha alto recorder model number YRA-28Bii. Yamaha's 20 Series recorder is designed to provide a perfect start to anyone's musical education. It offers an ideal amount of air resistance for easy control, and feature an accuracy of intonation you would expect to find only one more expensive models. Though other maker's plastic recorders may have a similar appearance, Yamaha ABS recorders are truly superior instruments. Model is 'Baroque' fingering system. The 20 series, easy to play throughout their ranges, are primarily intended for.