This 1-3/8" Round Knob is made of white thermoplastic, and has a 1/4-20 threaded brass insert. The thread depth is 7/16". The knob has a very slight rounded top and a textured finish, with serrations on the side for extra grip. The overall height from the base to the top is 3/4", the height from base to serrations is 3/8".

Sold individually, or in packs of 25, 50 or 100 for additional savings.