6221ZZC3BXMS Nachi Bearing 55mm x 100mm x 21mm Made in Japan 6221ZZC3BXMS Nachi Bearing, the 6221ZZC3BXMS inner diameter is 55mm, the 6221ZZC3BXMS outer diameter is 100mm, 6221ZZC3BXMS width is 21mm.