The VMCA9 ceiling plate is designed to attach to an NPT 1-1/2 in. threaded pipe. The VMCA9 will support a maximum weight of 226.8 kg (500 lbs). - CAUTION - Do not use this product for any purpose not explicitly specified by Sanus Systems. Improper assembly may cause property damage or personal injury. If you do not understand these directions, or have doubts about the safety of the assembly, contact Sanus Systems Customer Service or call a qualified contractor. Sanus Systems is not liable for