This 6006Z bearing has double shields High speed. Protect from dirt and debris.

Specification:

Model: 6006Z
Shield Type: Double Shielded
Inner Diameter (d): 30 mm
Outer Diameter (D): 55 mm
Thickness (B): 13 mm
Number of Pack: 1 Pcs
Weight: 109g

It is used for Electric Motors, HVAC, Automotive, Industrial Applications and much more.
One metal shield on each side of the bearing.

Selection Guide:

?Shields (Designation Suffix Z/ZZ) - High speed. Protect from dirt and debris.
?Non-contact seals (Designation Suffix RZ/2RZ) - Made of sheet steel reinforced NBR (oil- and liquid-resistant). Provide better sealing effectiveness than shields. Can be operated at the same speeds as shields.
?Contact seals (Designation Suffix RS/2RS) - Made of sheet steel reinforced NBR (oil- and liquid-resistant). Lower limit speed than Shield Bearings.