The PDS Series of model-specific low-profile mounts are cost efficient for projects requiring a large number of projectors. The low profile allows the installation of a projector less than 2.5″ from the ceiling. With mounting plates designed to …fit the industry’s top selling projectors, the PDS Series offers ease of installation and integrated security. The integrated 1.5″ NPT make the PDS compatible with all 1.5″ NPT adapters, pipes and accessories.Product Features:Projector-specific low-profile projector mountLock-It security hardware includedMates to standard 1.5″ NPT or directly to structural surfaces