Date: 2011-8-8 9:59:33 We are looking for the full ceramic ball bearings as following specs for the use of as standard component in a novelty carbon filter device intended for vehicle exhaust systems; 1 Full ceramic bearing Si3N4 2.Basic bearing model Nos: 626 and 608 / open type 3 Temperature range: minimum 500C 4. full compliment Our buying quantity would be 500 units each model/week. please send us 2 units samples of each model number on the following