Protect Linear Limit, For Use With Grainger Item Number 2YU66, 2YU67, 2YU68, 2YU69, 2YU70, 2YU71, 2YU72, 2YU73, 2YU74, 2YU75, 2YU76, For Use With Mfr. Model Number HUHAA Series, MUH Series, Fits Brand Berko, Dayton, Qmark