Set Of Used API Inner & Outer Concentric Knobs, Brown Center, For 1/4"" & 1/8"" shaft Controls. fairly poor condition, the brown painted center is worn and discolored, you may want to touch them up with paint. Silver portions of knobs are dirty but can be cleaned fairly easily. The smaller inner knob fits a 1/4"" shaft, the larger outer knob fits a 1/8"" shaft. Please note that the top of the inner knob doesn't quite fit inside the bottom of the outer knob, they need to be installed with a slight gap between them.
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