This 52205 bearing is a Double direction thrust bearing with a flat housing locating washer. The bearing's dimensions are 20x47x28.52205Double Direction Thrust BearingBore Size - 20mm

This 52305 bearing is a Double direction thrust bearing with a flat housing locating washer. The bearing's dimensions are 20x52x34.52305Double Direction Thrust BearingBore Size - 20mm

This 52406 bearing is a Double direction thrust bearing with a flat housing locating washer. The bearing's dimensions are 20x70x52.52406Double Direction Thrust BearingBore Size - 20mm