Rubber Sealed Angular Contact Headset Ball Bearings: These types are manufactured with rubber seals inserted into the outer raceway and in contact with the inner race providing protection against the ingress of moisture, dust and other foreign matter and serve to retain the pre-filled grease in the bearing.
These particular bearings are suited to headset applications
Seals: Seals can be easily removed for applications that only require 1 seal. Benefits: Prevents moisture and dirt getting into the bearing, lubricated for life, maximum load capacity
Note: These bearings may feature 'C3' on the box, this is not in reference to internal clearance and is a manufacturer code.
I contacted your support team to confirm I was buying the correct bearing and they were super. They offered a choice of 3 quality levels and I chose the budget which was of surprisingly good standard when it arrived. Within a couple of days on a free delivery. Well done support team.
John Bryant, United kingdom 18/08/2017
First time ordering here, based on the service it wont be the last. Great bearings for a sensible price and free postage too which is nice. Easy to fit in the headset and I'm off out on the bike again. Cheers to all involved.