Raceway-on-a-Roll® comes to you flat and coiled, in a pizza-like dispenser box. The coil lengths are, 50 ft. or 100 ft., depending on the raceway size...1/4", 3/8", 3/8" low-profile, 1/2", 1". Simply pull out the raceway, through the dispenser window in the box, cut and fold into a sturdy, non-collapsing raceway channel, with a hinged, snap-close lid. This allows for long, uninterrupted runs, with no waste and no couplers....saving time and money! Installers and integrators find the Raceway on a Roll easy to store in their vehicles, as well as moving it around, on a job site. Comes with 2-sided, adhesive-backed tape, already in place. The 3/8" low-profile inside dimensions are: width 3/8" x height 1/4"....perfect for hiding those speaker wires. Accessories are available for the 1/2" and 1" sizes.