The rotary knob with a 24mm black and white indication line from T Y & Co is a high-quality product suitable for various applications. Made of Bakelite, it fits round shafts with a diameter of 6mm, making it a versatile option for different devices. Suitable for round shafts with a diameter of 6mm<BR/>Features a white indication line for easy visibility<BR/>Made of durable Bakelite material for long-lasting use<BR/>Easy to install with a grub screw for blade screwdriver