607ZZ Miniature Deep Groove Ball Bearing 7×19×6mm For Micro‑motor RC Toy Precision Equipment Product Overview 607ZZ is a compact miniature single‑row deep groove ball bearing with dimensions 7×19×6mm. It is fitted with double‑sided non‑contact ZZ metal dust shields and pre‑filled high‑quality grease at factory. Made of GCr15 chrome steel, this micro‑size bearing runs smoothly at extremely high speed with low friction and quiet noise. It can bear radial loads together with