Dark brown wooden knob with a convex centre decorated with a 12-petal flower and two rings, the outer one being raised. Knob has a small white indicator dot on the outer ring. 1 17/64" diameter and 27/32' high. Grip has two rings. There is a short pedestal with one ring at the foot. Fits a 13/64" half round shaft with a spring, 9/16" deep.