The model 222661-C4 knob manufactured by Elesa & Ganter is a rotary adjustment knob made of technopolymer in black and a yellow cap, with a diameter of 70mm and a 12mm bore (M12). It is a 50mm element and is suitable for easy and comfortable manual adjustment of a control, lever, or other device. The nylon technopolymer provides resistance to temperature fluctuations, and is resistant to wear, abrasion, and corrosion, making the knob highly durable and suitable for a variety of industrial, commercial, and residential applications.