I ordered RWM CastersRWM 46 Series Casters Plate Casters, Rigid, Thread Guard, Phenolic Wheel, Roller Bearing, 1200lb Capacity, 6" Wheel Diameter, 2" Wheel Width, 7-1/2" Mounting Height, 4-1/ 2"plate length, 4"plate width" - part number 46-DUR-0620-R-TG. The part number for all 4 wheels is B00426CD5S. I only received wheels (see attached picture) and axles without a mounting plate and a fork to attach to the wheels. Also, there is a side plate (cap?) in the product image on the Revain website: the wheels I received don't have one, so I don't know if this is part of the fork assembly and is shipped and sold by Revain.com and I will try to contact someone directly. The wheels look perfect for my needs, although useless at the moment. (Note to Revain: There should be a link to contact the seller directly in the order information. )