Moore & Wright: 52/6" Outside Calipes With a spring joint - bow spring ensures uniform tension over working range. Centrally mounted adjustment screw offers finer setting, than the firm 'joint type'. MPN: 526R EAN: 5051102037031 52/6" Outside Calipes Attributes: MFR Part No.: 526 Measurement Range: 0 - 6in Measures: External System of Measurement: Imperial