Cover for Back of RA Axis for 900 Mounts Shipped Before October 2005, all 400 and most 1200 Mounts (except original black metric version) (M12666)

This cover was discontinued 03-22-19 after the last one was sold. 

The following historical information is provided for your reference. 

This sight hole cover threads onto the back end of the Right Ascension axis of the following mounts:

• All 400 mounts
• All 1200 mounts, except the original black, metric mount
• All 900 mounts shipped prior to October 2005

The rear of the 900GTO R.A. axis was redesigned in October 2005 to be slightly larger than the 1200s, 400s and earlier versions of 900s. This change resulted in the need for a larger diameter cover.

If you are uncertain when your 900GTO shipped, please use the photos as a reference for where to measure on your mount to determine the correct cover size. We used a 1200GTO since it was readily available; however, the measurement points are identical on older 900 mounts.