Got a wobbly stroller wheel or a bike hub that's seen better days? This pair of axle bearings might be just what you need. Each bearing has 7 steel balls (3/16 inch) in a retainer style, with a 13mm inner diameter and 20.5mm outer diameter. They're unbranded but made from solid steel, and come as a set of two. They're silver in color and suit various baby strollers (like Expedition Navigator models) and bicycles - but always check your measurements first to make sure they fit! These are brand new in original packaging, perfect for a smooth DIY repair job.