Robertshaw® Uni-kit® Universal Electric Range Infinite Switch, Non-push To Turn, 1-13-16"
Robertshaw -- Model No. 5500-204. Includes Adapter For Screw Or Palnut Type Mounting, White Dial and Adapters, Break-Off Shaft To Accommodate Various Shaft Lengths. 240 Vac, 5% Input At Low, 1-13/16" Shaft Length.