The One Systems SP.PMT Pole Mount System is a flexible suspension system designed for attaching ONE.SP series loudspeakers to pole structures while provide tilt aiming for added flexibility. The models designed for use with the SP.PMT are the ONE.SP6, ONE.SP8, ONE.SP12D and ONE.SP12T. The SP.PMT and the ONE.SP speaker models suspended by it are only designed for use in inland, non-coastal applications (at least 16 km / 10 miles from salt air environments). For square / rectangular poles, the minimum flat dimension must be 3.75 inches (95.25 mm) at the speaker's mounting height and for round poles, the minimum required diameter is 4 inches (101.6 mm) at the speaker's mounting height. One Systems does not imply suitability of specific poles or pole diameters. Each pole's capability must be verified by the pole manufacturer or others as to their structural integrity. For aiming flexibility, the SP.PMT allows a maximum down tilt of 35 degrees adjustable in 13.3-degree increments. The SP.PMT utilizes the U-Bracket and stainless steel hardware that are included with each ONE.SP speaker to attach the speaker to the bracket. To attach the bracket to the pole requires the use of Band-It stainless steel strapping, buckles and tools which are not available from One Systems. The SP.PMT includes a Link assembly that helps the aiming of the speaker. The SP.PMT is made of structural steel with a dual-layer, zinc-rich powder coating in a modern light gray finish.