BK1/S506-630-R BK1/S506-63-R BK1/S506-800-R BK1/S506-80-R BK1/S506-8-R BK1/S506B-160-R BK1/S506B-2-R BK1/S506B-40-R BK1/S506B-4-R BK1/S520-10-R