Collet knob for Round shaft 4.0 mm - 4 sizes 16/20/25/30 mm, no supports

Collar at the bottom, waisted, knurled head - the tall shape from valve radios. Sits high enough to reach past a recessed panel. For plain 4 mm shafts, held by an M3 grub screw. ## Sizes in the download All 4 diameters, same shaft fitting: | Diameter | Height | Volume | Weight in PETG | |---|---|---|---| | 16 mm | 13.6 mm | 1.6 cm³ | 2.1 g | | 20 mm | 14.8 mm | 2.1 cm³ | 2.7 g | | 25 mm | 18.5 mm | 3.5 cm³ | 4.5 g | | 30 mm | 22.2 mm | 5.2 cm³ | 6.6 g | Bore measured on the finished solid: 4.20…

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