we are specially to produce deep groove ballbearing in the north of china. our series: 6005-6013, 6204-6211, 6305-6310.   material: chrome steel, carbon steel or stainless steel.  seal: open, z, rs, zz and 2rs. grade: zv1, zv2, zv3.  we export to middle east and africa with good quality and competitive price.