Made specifically for 19" wide racks for 1.75 EIA 310D mounting hole dimensions (same mounting as most of today's racks).
Pack of ten 27U Blanking Panels = 270 Rack Mount U's total
Panels are pre-scored to be easily separated into any RU configuration between 1 and 27. Panel Overall Dimensions: 19 1/4" X 47 1/4" X .40" (H x W x D). Available in Black and White.