R8ZZ BearingFeatures:Chrome Steel2 Metal shielding to protect the bearing from any contaminationInner Diameter: 0.5"Outer Diameter: 1.125"Self-Lubricated(Grease)Deep Groove Ball Bearing

Shieldedbearingvs sealedbearing

(a) The examination of applicants for a license shall consist of a written examination that evaluates competency in protecting the health and safety of consumers of the services provided by licensees.

(b) The examination shall include written tests to determine the applicant’s skill in, and knowledge of, the practice of the occupation for which a license is sought and shall include written tests in antisepsis, disinfection, and the use of mechanical apparatus and electricity as applicable to the practice for which the applicant has applied for licensure.

R8ZZ BearingFeatures:Chrome Steel2 Metal shielding to protect the bearing from any contaminationInner Diameter: 0.5"Outer Diameter: 1.125"Self-Lubricated(Grease)Deep Groove Ball Bearing