Nova Discs are ideal for polishing backs of cabs, nodules, geode faces, and similar flats as well as for sanding and polishing cabs. They have a soft, rubber backing and are lightly convex (domed) so that under pressure of your stone, they provide an even polishing surface in the middle are often missed with other methods. A standard ¼”-20 thread bolt is molded into their plastic back-up plate to fit our Gem Maker machines, and most other machines accepting that bolt size.
The 4” Nova Disc is recommended for Pixie, and the 5-1/2” Nova Disc is used on the Genie and Titan.
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