BK-S505-3-15-R BKS5055A BK-S505-5-R BKS5056.3A BK-S505-6-3-R BK-S505H-V-1.25-R BK-S505H-V-1.6-R BK-S505H-V-10-R BK-S505H-V-12-R BK-S505H-V-15-R