The PP450 and PP451 were designed are for outdoor use with medium-size pendant domes (such as DF8 Series). The PP350 and PP450 models mount to parapets. All models accommodate domes that use 1.5-inch NPT pipe. The PP450 and PP451 can be used in applications where mounting and height clearances of models PP350 and PP351 are inadequate. Models PP450 and PP451 are higher by 9.72 inches (24.69 cm) and the overhang is increased by 14.77 inches (37.52 cm).

The mounts are designed to swivel within available clearance limits, which adds to the flexibility, easy maintenance, and usability of the configuration. Manufactured from aluminum, the mounts include indexing bolts to secure the arm in position.