This Polaris XCR SP 600 triple cylinder has the casting number EC59PL and is newly re-plated to stock specs with a lifetime plating warranty by the plating shop. There may be some porosity visible in the plating, but it doesn't affect performance or longevity. There is no core exchange required for this cylinder.  Shipping is only in the lower 48; unless you are purchasing through eBay's Global Shipping Program.  If you are in Alaska please contact me before purchasing to check on shipping options.  Thanks, -Paul