This buy it now auction is for one, 3U Fan Rack Panel Attractive Circular Pre-Punched Holes, For 2 Fans. (120mm fans not included)

Pre-punched hole fixing for fans are at 105mm centres (Uses 120mm fans) For use in all types of standard 19" rack cabinets, cases, flight cases etc. The panels are made from 1.2mm thick zinc coated mild steel, with folded sides to make the whole panel strong and rigid. Then powder coated black finish.

Space between fan holes is 170mm