BK/S505SC-2-R BK/S505SC-3.15-R BK/S505SC-4-R BK/S505SC-5-R BK/S505SC-6.3-R BK/S505SC-8-R BK/S505SCH-3.15-R BK/S505SCH-5-R BK/S505SCH-6.3-R BK/S505-V-1.25R