Wiper arm for 4574 and 4575 adjustable sweep wiper motors.
*The arm adjusts from 13" to 17" length (330mm to 430mm) and has a locking tab to release and re-tighten the arm for adjustment. *It also has an adjustable knuckle to allow the blade to adopt different angles to the arm. *The tang on the end of the arm is 7mm wide, and fits blades 4577 or 4578.
*This arm is splined, and the spline is APPROX 13.7mm diameter. *There are also 2 grubscrews to tighten the arm onto the motor spline (Allen key included).