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Silicon Nitride Balls
BMT 931 4012 SA-AD
2 1/2" Inner Diameter Bearing
UCFL209 Mounted Bearing
the rest is for your imagination to build a new design or create a new idea
S685ZZ Ceramic Bearing 5x11x5mm Double Shielded Premium ABEC-5 Bearing Outer Diameter - 12mm Silicon Nitride BallsS685ZZ Stainless Steel Premium ABEC 5 Ball Bearing With Si3N4 Ceramic Balls (Silicon Nitride) 5mm x 11mm x 5mm S685ZZ Stainless Steel Premium ABEC 5 Ball Bearing, Made of stainless steel, each Comes with double metal shields (ZZ) to keep out dust and dirt, Ceramic Balls are the highest standard of balls that can make your bearings live at least 5 times more than any other bearings. S685ZZ Ball Bearing Deep Groove Ball Bearing Lubrication: Dry Quality: