Davies Thermoplastic Four Arm knob， Flute Rim， Threaded Through Hole， 1/4"-20 Thread Size X 1/2" Thread Length， 1-3/4" Diameter (Pack of 5)</br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br><img src='http://ecx.images-amazon.com/images/I/41Tc97AVyyL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/417hc6CPTkL.jpg' noproxy></br>