R Series Thrust Ball Retainer - Aetna Bearing Company
Amazon.com : Lanturn Bicycle Wheel Bearing Retainer 3/16 inch x 7 Balls,4 Pcs Ball Bearings for Bike Front Wheel, Kids/Stretch Bicycle : Sports & Outdoors
4pcs 44mm x 9 Ball Crank Bearings Wheel Bearing Retainer for Bike Silver Tone | eBay
Unique Bargains 2pcs 37.6mmx7 Ball Bearings Cages Crank Bearings Wheel Bearing Retainer for Bike Silver Tone - Walmart.com
A Guide to Bearing Retainers (cages) for SMB bearings
Ball Bearing Retainer Rolling Guide Bushing Supporter Steel Ball Cage Miniature linear ball guide sleeve CNC - AliExpress
Ball bearing retainer 1/4\" X 9 ( (Bottom Bracket /Crank - English 3pc)
Ball bearing retainer 3/16" x 11 Shimano Nexus 7 SG-7R40/41/42/4C30/4R31