I purchased the Vision Grill Diamond B Series Grill from Sams. I did not like the stock plastic 2" casters. It looked like an accident waiting to happen. I purchased the 5" Black Rubber Swivel Caster, M12x1.75 Threaded Mount with Lock based on a previous review on this site. I could not be happier with this product. It was a direct fit. Now I have casters on my grill that is much more capable than stock. Thanks!