This adapter allows you to install the iOptron CEM120 onto the sturdy yet portable iOptron Tri-Pier. Due to the payload limitation of the Tri-Pier, the CEM120 cannot be used with a heavier payload. The total weight capacity of the Tri-Pier must not exceed 100kg. For payloads greater than this, you must use the Tri-Pier 360. Use at your own risk.