Its electrical strut and can be found at home depot in 10 foot lengths for about $25. They are located in the electrical aisle. I used the narrower 3/4" but kind of wish I had used the wider 1.5".
Its electrical strut and can be found at home depot in 10 foot lengths for about $25. They are located in the electrical aisle. I used the narrower 3/4" but kind of wish I had used the wider 1.5".