These pancake vibration motors shake like crazy at about 3v.
Black X shape knob with a white line indicator on one of the wing. Plastic knob with brass insert and set screw fittings. This knob will fit for .25" shafts. Diameter 1.18" and height is 0.79".
Dimensions: 20mm x 5mm. Rated: 250V (note: indicate or not indicated on the fuse.). Prepackaged: Order fuses in increments of 5 pcs.