Universal Rack Kit consists of:
  -  2 spacer plates 1" x 3" x 1/8" thick aluminum
  -  4 each 5/16-18 x 2" hex cap screws
  -  4 each 5/16-18 hex nuts
  -  8 each 5/16 plain washers
Use the Universal Kit on Universal Racks and Universal ExpandaRacks, Standard Rack Kit consists of:
  -  2 spacer plates 1" x 3" x 1/8" thick aluminum
  -  4 each 1/2-20 x 1" hex cap screws
  -  4 each 1/2-20 hex nuts
  -  4 each 1/2 plain washers
Use the Standard kit for all Standard racks, QuadraRacks, Standard ExpandaRacks, XLBET Systems, MDF Systems.