Three Sizes 2U- 3U- 4U. Easy Adapt For Rack Fitting. Easy To Use. Sold SinglyDimensions: 2U – 88 x 140 x 20mm 3U – 132 x 140 x 20mm Front Fixing Holes 7 x 10mm Side Fixing Holes: 4.6mm. If you need to fit equipment into 19 inch racks these are the panels you need. Often electronic equipment has side fixings to secure panels such as these or holes can be made to allow for their attachment. You can then safely secure your equipment into a rack case with ease. Three sizes are available for 2- 3 or 4 Unit equipment. 88- 132- or 176mm. Two are needed- please purchase 2 of your preferred size at checkout.. rack panels-rack ears