Astro-Physics 18" Flat Mounting Plate for 900,1200 and 1600 Mounts - all Astro-Physics refractors, except Traveler and 130EDFS.
This larger machined aluminum plate is available for the 900, 1200 and 1600 mounts. It is 18" long and 7.5" at its widest point in the center. The width of the plate tapers to 5.5" at each end. Four pairs of keyhole slots that measure 3.2" between centers are provided. The two inner pairs are 13.75" apart and the outer two pairs are 17" apart. You can drill additional holes to suit your needs.