Additionally, an adjustable thumb rest makes playing comfortable for hands of all sizes. As a result, the Yamaha YCL-650II appears nearly identical to the Yamaha Custom SEVR model clarinet. But the YCL-650II's trusty leather pads - designed to withstand heavy usage and eliminate unwanted clicking noises - are among its most significant new features. Play like a pro without paying like a pro If you're a serious player seeking a professional clarinet, look no further.