Field, For Use With Grainger Item Number 5PYN3,5 PYN4, 5PYN6, 4Z714, 1UNH8, 5PYN8, 4Z715, 1UNH9, 1YMJ7, For Use With Mfr. Model Number HG-201A, HG-201AK, HG-201A-MC, HG-301A, HG-301AK, HG-301A-MC, HG-501A, HG-501AK, HG-501A-MC, Fits Brand Master Appliance, Master Heat , Master Varitemp Heat