I have this caster as a spare wheel for a True Model T-19F commercial freezer ordered . They just fit perfectly as the freezer has a 1/2"-13 stem (as stated in the video description). However the photo shows a bike with a grip ring stem. I ordered based on the description and not based on it the photo. I got lucky. I tried to contact someone about the photo but I didn't spend enough time to figure out how so I gave up and wrote this review instead. T-19F and that's just a fraction of what restaurant salespeople charge for it. Good luck to you all. Tom Sadowski