This extension column can be used with any 1.5" NPT mount. It consists of a 1/5" NPT column that is threaded on both ends.
Compatible with Chief Manufacturing's CMA012018 (12"-18"), normally priced at $62-$113 *
Q & A:
Q: How do I determine if this pipe will work with my current Projector Mount? A: If you measure the pipe, the outside diameter is about 1.9". This will assure it will work with our pipe.
Q: Does this pipe works with all the projector mount MountDirect offer? A: No, it does NOT work with our PMS Series Projector Mount. This extension pipe only fits the pipes with 1.5" NPT Standard.
*According to PriceGrabber.com, Dec 1,2007 search result.