The APP-1321 adjustable height suspension adapter easily connects all projector mounts and features height adjustment from 13 - 21 in. (33-53.3cm) in 1.25 in. (3.18cm) increments on a 1.5 in. NPT pipe. - Protective shipping caps and durable box construction protects the pipe during shipping - Cable routing hole with access through pipe - Works with flat-panel mounts and projector mounts - Adjusts from 13 - 21 in. (330-533mm) in 1.25 in. increments on a 1.5 in. threaded pipe