Cybecut Ceramic Ring 17.6mm Diameter 6mm Thread 2D
https://www.fabtechshop.com/shop/ccd17-5m6h17-6-y-cybecut-ceramic-ring-17-6mm-diameter-6mm-thread-2d-3716
https://www.fabtechshop.com/web/image/product.template/3716/image_1920?unique=dfe6821
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Out diameter: 17.6mm
Thread size: M6
Ceramic height: 17.6mm
Cutting type: 3D