Wittner Isny Model 282 Rest - 4/4 - 3/4 w/ ClampsThe Wittner ISNY Model 282 3 4 4 4 Violin and Viola Shoulder Rest is designed to fit and be used with all other chinrest brands other than Wittner. It features a free floating design, no muting effects, central mounting, universally adjustable, all materials are anti allergic, super light construction, fits absolutely ergonomically, and stays always in the same position after being mounted. It comes with everything needed to mount it onto your 3 4 4 4