BK/S506-V-50-R BK/S506-V-500-R BK/S506-V-4-R BK/S506-V-40-R BK/S506-V-400-R BK/S506-V-32-R BK/S506-V-315-R BK/S506-V-3-15R BK/S506-V-3.15R BK/S506-V-2-R