"Most folks associate the word Unistrut with our open, U-shaped and back to back metal framing channel styles. If you want the adjustability associated with our traditional strut, but need four-sided square tubing, we have an additional option. Telestrut comes in 1-7/8" x 1/7/8" and 1-5/8" x 1-5/8" sections, complimented by a series of 1-5/8" standard channel sizes that can telescope into the 1-7/8" tube. Incrementally and infinitely adjustable, Telestrut is compatible with over 100 standard Unistrut fittings and accessories to give the system unprecedented versatility.
We could keep listing additional reasons why Telestrut is ideal for a wide range of applications, but sometimes it is easier to introduce a new Unistrut material using a video like the one below: