These are replacement bearings for all Profile Racing hub Single Speed 4 pawl drivers (Race, SS, Mini and Totem). They are sealed and self-lubricating. 
There are four (4) of these bearings in a Profile Racing cassette hub driver. MFG # 6802. Price is for a set of four (4) bearings. Shipping outside the continental US extra. Bearing seal colour subject to change without notice.