This is the Custom Aluminum Shoulder Rest for NS Design CR & WAV Electric Violins. Unlike the original high-quality plastic rest that comes with these great violins, the new 'Custom' Shoulder Rest for the NS Violin can be formed by the player to fit his or her body perfectly. Firm foam is backed by a layer of malleable aluminum that can be bent with thumb and forefingers to mold the rest into virtually any position. Once the shoulder rest is formed, the shape remains fixed, providing a secure structural platform. In addition, it is fully adjustable for height and angle with the adjustment knob located within easy reach of the right hand so adjustments can be made with the instrument in playing position. This shoulder rest fits any NS Design WAV, CR4, or CR5 electric violin perfectly.