Moore and Wright MW432-02DC Inside Groove Digital Caliper 432 Series 10-20mm (0.4-0.8") | machine-dro.co.uk - Machine DRO UK
ACiyD Electronic Inside Groove Caliper, Digital Caliper Measuring Tool, Large LCD Screen, Stainless Steel Vernier Caliper for Internal Groove Measurement (Size : 15-300 mm) (70) : Amazon.co.uk: Business, Industry & Science
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Metric/ Inch Digital Electronic Vernier Caliper for Inside Internal Slot Groove Measurement - China Vernier Caliper, Digital Vernier Caliper | Made-in-China.com
Length, Groove, Thickness and Diameter – Wessex Metrology