Will the openings stretch overtop of a connector?

The diameter of the spring coil is 3 in, and the PVC and foil liner is a little bit inside of this. I was able to stretch the liner and get the connector inside, but it might be worth going with the next size up.

Is this UL approved for dryer venting?

No. I wouldn’t use this. Higher temperature applications require a different flex usually all aluminum for dryer venting because of the moisture levels being exhausted.

What is the inner diameter ? will this fit to 3" pvc ? i am trying to use it for the intake and outtake of tankless water heater

Inner diameter is 75mm, fit to 3"

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🖤 Silence, Strength, and Style in Every Inch

BUILT TO LAST - Triple-layer construction resists rips and pinholes effortlessly
TOTAL LIGHT BLOCKOUT - Thick black PVC layer ensures zero light leakage
WHISPER QUIET VENTING - Cut noise by up to 50% for a peaceful environment
VERSATILE AIRFLOW SOLUTION - Perfect for kitchens, grow tents, bathrooms, and dryer rooms
FLEXIBLE FIT EASY INSTALL - Bend, cut, and slide into any 5" HVAC or grow setup with ease

The Hon&Guan 5" Air Duct is a 16-foot long, black flexible ventilation hose designed for HVAC and grow tent applications. Featuring a thick black PVC layer to block light, a 3-layer reinforced structure for durability, and engineered to reduce fan noise by up to 50%, it offers a quiet, robust, and versatile airflow solution for kitchens, bathrooms, grow chambers, and more.

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