This is the Norton HIGH PRODUCTIVITY BLACK STRIP pad.
Sold by the case (5 pads in a case).
Sizes 6-1/2" to 9-1/2" (2-3/4" removable center).
For floors with an extreme wax buildup, this pad will cut away old finish quikly with its tough, porus construction.
The 6-1/2" to 9-1/2" pads are a non stock item so allow an extra 3-5 days for delivery.