YR-Seasons Set of 4, Gold 4/4 Size Violin Stable-style String Adjusters Fine Tuners with Screw Material: Nickle. Fit a 4/4 size cello/Violin. This is a good quality cello fine tuner/adjuster. Great material and technic,strong and appropriate. Dimensions: (1.10 x 0.91)" / (2.8 x 2.3)cm (L x W).