AT-LP120X Alignment: Stevenson Groove radii: IEC/RIAA Inner groove: 60.325 mm Outer groove: 146.05 mm Inner null radius: 60.325 mm Outer null radius: 117.421 mm Pivot to spindle distance: 214.5 mm Overhang: 15.921 mm Effective length: 230.421 mm Offset angle: 22.687° Linear offset: 88.873 mm 190 × 190 mm