Cylinder knob for Square shaft 12.0 mm - 4 sizes 30/36/44/54 mm, no supports

A straight cylinder with five circumferential grooves. The quiet one - it disappears into a panel instead of decorating it. Square 12 mm, the size on stopcocks and shut-off valves. Big enough that the knob, not the square, is what gives up first - so do not put a bar on it. ## Sizes in the download All 4 diameters, same shaft fitting: | Diameter | Height | Volume | Weight in PETG | |---|---|---|---| | 30 mm | 23.6 mm | 12.1 cm³ | 15.4 g | | 36 mm | 25.9 mm | 13.8 cm³ | 17.5 g | | 44 mm | 31.7 m…

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