United States
Stuller
United States · Last checked 10 November 2026
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- Minimum wall
- 0.8 mm minimum for structural and external walls. 0.6 mm for walls and floors between structural walls. The general minimum metal to cast is 0.5 mm thick and 0.6 mm deep.
- Minimum shank
- Profile width 1.5 mm minimum and profile height 1.7 mm minimum. Bridge width 1.5 mm minimum and bridge height 1.2 mm minimum.
- Prong minimum
- 0.45 mm minimum, proportionate to the stone. Shared-prong and pinpoint channel walls are 0.4 mm minimum from the outer edge of the wall to the prong base.
- Bezel minimum
- Top wall 0.45 mm minimum. Bottom wall 0.45 mm. Seat length 0.6 mm.
- Finishing allowance
- Account for up to 0.2 mm of metal removed during polishing.
- Preferred file
- 3dm NURB file, not unioned or joined into one solid mesh. STL files are accepted. Stones must remain in the file, or every stone size must be supplied.
Openings at least 0.5 mm wide. Scroll or filigree 0.5 mm thick by 0.6 mm deep. Culet at least 0.5 mm clear of the finger rail. Distance between rails at least 0.6 mm, or 0.8 mm for platinum and palladium. Channel-set walls 0.8 mm. Letters at least 0.35 mm wide, spacing at least 0.3 mm, and recessed lettering no deeper than 0.6 mm. Pilot holes only when the metal under the stone is no deeper than twice the hole width.