Designed to provide a perfect start to anyone's musical education. They offer an ideal amount of air resistance for easy control and feature an accuracy of intonation you would expect to find only on more expensive models. Though other manufacturers' plastic recorders may have a similar appearance Yamaha ABS recorders are truly superior instruments. FEATURES. The baroque fingering system is one of the features that makes the YRS-24B the most popular school recorder. Constructed from ABS resin plastic which is a very durable plastic ideal for student use. The three-piece construction of this recorder makes for easy tuning and cleaning. Accessories include a carry bag fingering chart and owner's manual.