The Elesa & Ganter 221641-C1 is a Knob with a diameter of 70mm, a thread size of M16, an outside diameter of 17mm, a height of 35mm, and a material composition of technopolymer (PA) in a black finish. It is designed for use with many control or adjustment applications, such as grip handles, adjustment levers and handwheels. The technopolymer construction provides superior durability and resistance to wear, impact, vibration and other damaging forces, while the black finish increases its aesthetic appeal.