Schaller Dome Knob Cylinder BC, Set of Potentiometer Knobs, Knurled, cylindrical knob, Material: Brass, Attachment: Grub screw, Outer diameter: 18.3 mm, Height: 18 mm, Shaft bore: 6.2 mm, Weight: 26 g each, Schaller No.: 15020400, Finish: Chrome-plated black, Screws included, Package quantity: 2 Pieces, Made in Germany