Fits 30mm lens diameterHigh grade lens in aluminum housing for superb durabilityLens Structure: 3 group, 3 element

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30.5mm mount thread 3 elements in 3 groups

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Lowers TV to the desired height1 1/2black pipe threaded at both ends and notched for safety locking

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1 GB 266MHz DDR DETAILS: 1.0 GB PC266 DDR DRAM 184-pin (DDR) Double Data Rate memory, 266MHz Providing 3x the throughput of SDRAM, DDR memory's high performance comes from its ability to perform two data operations in one clock

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110 punch-down and RJ-45 inputsRJ-45 connector output for expansion to another hubRJ-31X through test port for security system dialer, allows system to seize the line for system dialing

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