1. Good Smooth 2. High precision 3. RoHS compliant 4. Lowest price ... These bearings are offered in ABEC 1 through ABEC7 precision grades, pre-loaded, corrosion protected, grease-lubricated, ... other specialty bearing steels to provide corrosion resistance, high temperature capability, alternative load capacity, or chemical ... in this list,please contact us. High precision large thin ball bearings