As you know, 6200 ZZ C3 is a very standard bearing type. It's just normal deep groove ball bearing. The outer diameter is 30mm, inner diameter is 10mm, the width is 9mm. It has 2 metal shields on both sides. The radial clearance is C3 group. But it's difficult to put the bearing with injected plastic cover. This kind of special bearing can be widely used for medical equipments, eg, Philips' X Ray Scanner.