BK1-S500-500-R BK1-S500-50-R BK1-S500-5-R BK1-S500-630MA BK1-S500-630-R BK1-S500-6-3-R BK1-S500-800-R BK1-S501-10-R BK1-S501-1-6-R BK1S50125R