we can supply DOUBLE ROW SELF-ALIGNING BALL BEARINGS Here are brief introduction of our company: Our total mainly produces and sales more than 3,000 varieties of rolling bearing, nonstandard bearing, and special structure bearing with outside diameter from 40mm to 2,250mm. Our factory has many engineers from ZWZ factory or SKF it is constructed with the inner ring and ball assembly contained within an outer ring that has a spherical raceway.