... shields), ZZ type (Metal shields), 2RS type (Contact rubber seals), 2RZ (Non-contact rubber seals). The 6310 Ball bearings usage: Motor, Power tools, House ... bearingBrand nameW QSeries6300 seriesMaterialChrome steel (Gcr15)OriginalChinaSealingOpen, Shield(Z, ZZ), Rubber(RS, 2RS)SamplesAvailablePrecision RatingP0,P6,P5Quality StandardISO9001:2008, ABEC1/3 ...