6804 Full Ceramic Bearing Si3N4/PTFE 20x32x7mm6804 Full Ceramic Ball Bearing Silicon Nitride 6804 Full Ceramic Ball Beairng, bearing is Silicon Nitride with 14 Si3N4 Ceramic Balls. the inner diameter is 20mm, outer diameter is 32mm and the width is 7mm. 6804 Ball Bearing Full Ceramic Ball Bearing Material: Full Ceramic Si3N4 (Silicon Nitride) Cage Material: PTFE (Polytetrafluoroethylene) Closures: Open Balls: 14 Ceramic Balls Si3N4 (Silicon Nitride) Dimensions: 20mm x 32mm x 7mm Metric ID (inner
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