Chief CMA115W 6 Inch Flat Ceiling Plate - White is UL-listed and is designed for ease of installation with any height of drop ceiling. By using any length of standard NPT 1-1/2 inch pipe threaded both ends, you can extend the height capabilities to meet your needs. This can also be combined with any Chief CMS Fixed or Adjustable Extension Column to customize your installation. Use where a short extension column will be used, or in installations where there may not be adequate space for a larger plate. Weight capacity is 500 pounds. Flat 6 inch ceiling plate combines with any CMS Fixed or Adjustable Extension Column.