Yes, our inventory is accurate!
See It In Person - On Display In Our Showroom!
Qualifies for Free Ground Economy Shipping (CONUS Only)
Pier Mount 90 for AM7

Built for the heavier payload with the ZWO AM7, the William Optics Pier Mount 90 provides a 90 kg / 198 lbs payload capacity while weighing only about 7 kg / 15 lbs.
![]() |
![]() |
Pier Mount Plate has central 3/8" attachment screw, and three holes for additional connection with M6 screws to the ZWO AM5 and AM7, and other compatible mount heads.
Included leveling feet allow precision adjustment for hard or soft surfaces.
Does not include a case, but fits perfectly in the Celestron 34" Tripod Soft Case.
Note: The AM5N mount with the Pier Mount Plate attached does not quite fit into the ZWO AM5N case.

Mile High Exclusive: To simplify setup, we have added tool-free attachment knobs along with nylon washers for the top plate, as shown above to prevent scratches from metal washers.
![]() |
![]() |
Specifications
| Adapter | 3/8" Thread ( for ZWO AM3N/AM5N ) |
| Weight | approx. 7 kg |
| Loading Capacity | 90 kg / 198 lbs |
| Height | Stance: 89.3 cm Closed: 79.3 cm Foot Adjustable Height Range: 15 mm |
| Material | Aluminum Alloy |
| Pillar Diameter | 100 mm / 4" |












