Draper: 39500 6"/150mm Steel Caliper Gauge General purpose calipers with thumb wheel fine adjustment. Can be used for internal, external and depth measurements. Graduations shown in metric (cm/mm) and imperial inch marks. MPN: 39500 EAN: 5010559395002 39500 6"/150mm Steel Caliper Gauge Attributes: Additional Features: thumb wheel fine adjustment MFR Part No.: 39500 Material: Stainless Steel Measurement Range: 0 - 150mm Measures: External Internal System of Measurement: Imperial Metric Weight Each: 90.7g