Speaker Cabinet Port Tube 1-13/16" ID x 1" L This high-quality port tube is perfect for tuning small high-performance bookshelf or stand mount speakers. These ports are also popular for use as a sleeve in pass through holes for wire and cable in counters, cabinets, and walls. Ports are a press-fit style and can be trimmed to length if needed. Requires 1.97" opening. Dimensions: Overall port length (including flange): 28.4 mm (1.11") Overall front diameter (across flange): 71 mm (2.79") Inner diameter: 46.4 mm (1.83") Effective port length: 25.4 mm (1") Mounting hole diameter: 50 mm (1.97")
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