BK/S-8001-1 BK/S506-V-8-R BK/S506-V-80-R BK/S506-V-800-R BK/S506-V-63-R BK/S506-V-630-R BK/S506-V-6.3-R BK/S506-V-5-R BK/S506-V-50-R BK/S506-V-500-R