Ceiling plate, 12x12 (model PP-12) This 12¿ x 12¿ adapter plate has a 2¿ threaded coupling for national tapered pipe. It is used for concrete mounting surfaces, in conjunction with our wide-top adjustable-height suspension adapter (APM-2446-WT) for drop distances of more than 3'10". Pipe coupling is slotted for safely routing signal cable through pipe interior.
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