This is a Meade #929 2 in. Miror diagonal. Screws directly onto the rear cell of a Meade/Celestron SCT. Includes 2 in. to 1.25 in. adapter. It is in like new condition with the box. Mirror has never been cleaned or touched. $80.00 plus shipping. Payment by Money order, Cashiers check, or Paypal. I do not charge a surcharge for using Paypal. E-mail me if you have any questions. Preference given to registered Astromart users.