Police are appealing for information after products were taken from a firm on the northern outskirts of Longtown.
The John Davidson Pipes site was targeted between 5pm on July 10 and 7.30am on July 13.
It is believed a large vehicle was used and gates damaged to get in.
Anyone with any information is asked to contact PC 2838 on 101, or call Crimestoppers anonymously on 0800 555 111, referring to incident 32 of July 13.
