Typically, the 18549 kit is used to mount a CC5MPX, CC5MPXWD, or CCFC camera onto a CM202, CM203, CM204, or CM206 crossarm. The crossarm then attaches to a tripod, tower, or pole. This kit can also be used to mount the 18543 CC640 Camera Enclosure or PWD22 Present Weather Sensor (manufactured by Vaisala) to a crossarm. The 18549 can be used to mount a pipe with a maximum OD of 1.5 in.