What We Like About The Wesco Greenline Panel CartThe most convenient aspect of this cart is definitely the side loading rollers. Usually one must be very careful not to scrape the side of heavy panels on the edges of carts but with the rollers one pe rson can do the job without worry. They are as useful for taking panels out as well. The center compartment has removable rods which can be removed or left in place to support an included plastic bin. The standard size can hold up to 1543 pounds whil e the larger heavy-duty model supports 4000 pounds