Product review (3 stars): Worked fine
I found the part number underneath, can't get to it without pushing off a locking clip. There's some splines on the bottom of the knob that engage with a shaft on the machine. Be sure to check that the ones on the machine are in decent shape, the splines on the machine have to be OK or there won't be anything on the knob to engage! Nothing really wrong with it, I just can't get that excited about washer parts I guess.