The block is a "split" 66M design, that can handle up to 50 pairs of wire if used in a split configuration, or 25 pairs if all four columns are joined with bridging clips (available below). It's made of high-impact flame-retardant thermoplastic, and should provide many years of reliable service.
The industry standard 89B mounting bracket provides a neat and space-saving installation. It's open-ended, so the installer can position wires and cable for stacked blocks before snapping a block into place, and it's also possible to snake wires through the bracket after the block is installed. Brackets are molded from flame-retardant thermoplastic.
The clear plastic cover permits visual inspection of wiring, while providing protection and a neat appearance. It makes your phone system or data network more reliable, and shows that you care.
Even if you need just three or four blocks, you can still save money with our $89 six pack! (Less than $15 per set.)