Dunlop BTL 6006-2Z DUN Std Bearing The metal shields on these bearings are designed to offer protection against the entry of some dirt and so on, as well as lighter mechanical damage. Shielded bearings also help to contain the lubricant/grease. These deep groove ball bearings are versatile, robust and moderately easy to maintain. Features: Single row Deep groove bearing Standard clearance Shielded type Shield part number - ZZ or 2ZR GBP 2.59 1