Dished knob for Round shaft 3/8 in (9.525 mm) - 4 sizes 20/25/30/36 mm, no supports

Low and dished, so the thumb sits in it rather than on it. Good where a knob must not stand proud of the panel. 3/8 inch is 9.525 mm, the shaft size on American valves and older machine tools. Built on the exact conversion, not rounded to 9.5. ## Sizes in the download All 4 diameters, same shaft fitting: | Diameter | Height | Volume | Weight in PETG | |---|---|---|---| | 20 mm | 21.6 mm | 3.3 cm³ | 4.1 g | | 25 mm | 21.6 mm | 5.1 cm³ | 6.5 g | | 30 mm | 21.6 mm | 6.7 cm³ | 8.5 g | | 36 mm | 21.…

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