150-300mm Metric Outside Micrometer Set - 3203 Series (Insize)Explore the Precision of the Outside MiCROMETER 150 300mm Metric Set Graduation: 0. 01mm. Carbide measuring faces. Supplied with setting standards (except 0 25mm). The Insize 3203 Outside Micrometer is the best selling Insize micrometer. The micromter comes with carbide measuring faces for longer tool life and durability from machine shop wear. Sizes range up to 300mm. High Accuracy and Durable Construction The Outside MiCROMETER 150 300mm metric set