Mini Stainless Steel 304 440 Deep Groove Ball Bearings 603ZZ – 698ZZ Bore 3-9mm
603ZZ 604ZZ 605ZZ 606ZZ 607ZZ 608ZZ 609ZZ. 694ZZ 695ZZ 696ZZ 697ZZ 698ZZ 699ZZ. 60X 603ZZ 3 9 5. 698ZZ 8 19 6. Stainless Steel AISI 304 / AISI 440 Miniature Deep Groove Ball Bearings Corrosion Resistance Waterproof Bore 3mm – 9mm.
603 – 699 ZrO2 Full Ceramic Miniature Bearing Zirconia Roller Ball Bearings
You will find that unbranded bearings like this one hold their own in rougher conditions.