Comparison : Item # SER-201-8, SER Series Pillow Block Ball Bearings
Item # SER-202-10, SER Series Pillow Block Ball Bearings
Item # SER-204-12, SER Series Pillow Block Ball Bearings
Item # SER-205-14, SER Series Pillow Block Ball Bearings
Item # SER-205-15, SER Series Pillow Block Ball Bearings