Cybecut Ceramic Ring 31mm Diameter 11mm Thread 2D
https://www.fabtechshop.com/shop/ccd31m11h13-5-cybecut-ceramic-ring-31mm-diameter-11mm-thread-2d-3709
https://www.fabtechshop.com/web/image/product.template/3709/image_1920?unique=d3275fb
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Out diameter: 31mm
Thread size: M11
Ceramic height: 13.5mm
Cutting type: 2D