They quickly sent this reply:
We have noted your inquiry for the international shipping eligibility of a Norpro 18 Inch Aluminum Magnetic Knife Bar. As we have to confirm the shipping eligibility of the item you provided to our U.S. Warehouse Team, kindly allow us 1-2 business days to relay the results.
And a few days later:
We are pleased to inform you of our U.S. Warehouse Team's confirmation that this item (Norpro 18 Inch Aluminum Magnetic Knife Bar) is safe for air freight, and that we will certainly be able to ship this to you internationally. As such, you may arrange for delivery of this product to your U.S. address (or add it to a BuyForMe order) at your convenience.
That's service! To be fair, I was wary of HSG in the past due to their tendency to overestimate the volumetric weight and poor documentation (no itemised invoice), so they're not perfect.