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Wall Mount Duct Shutter 4 White Steel 4" Wall Mount Duct Shutter Monitors & Timers The Bluelab In line pH Probe The Bluelab In line pH Probe can screw directly into female 1" NPT pipe fittings using the included adapter MOQ of 30 units 1 pallet The round duct tailpiece is compatible with 4” inline exhaust fans A wall mounted shutter designed for use with grow rooms
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