[Found!] Wiper knob

[b’s duster]

Looking for a wiper knob for my 70 Duster rally dash if that makes a difference. Thanks.

 

[Oldmanmopar]

There are 2 different knobs 2 speed small shaft and variable speed large shaft.

 

[b’s duster]

I am going to say it’s a normal 2 speed, wiper.

 

[Oldmanmopar]

What is the shaft Diameter?

 

[b’s duster]

Shaft diameter is .28 and it is a two speed not a variable as I ran it. Didn’t have calipers, so took circumference x pi.