vintage 2" diameter black shift knob--hard plastic/bakelite composite type material is my best guess--the opening for rod is max. 9/16"--The finish has some wear to the finish but no kinks or cuts-The photos exaggerate the condition of the finish--you can't feel or see the microscopic blemishes of this knob that are shown in the photo-The condition of this knob is very good--free postage