Uline 8" x 2" heavy duty fixed casters, polyurethane. 12 fixed, 4 swivel. UNUSED. Some have been brushed/sprayed with bed liner. These were removed when I modified my platform trucks to all swivel casters.

$200 OBO for all of them. Will also sell in smaller sets. Text message is best.

https://www.uline.com/Product/Detail/H-1825RIGID/Platform-Trucks/Polyurethane-Caster-for-U-Boat-Platform-Trucks-8-x-2-Rigid) and ?? 8" x 2" swivel casters (Heavy Duty Polyurethane Caster - Swivel, 8 x 2"

https://www.uline.com/Product/Detail/H-4943S/Casters-and-Wheels/Heavy-Duty-Polyurethane-Caster-Swivel-8-x-2