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![Trident Marine 4" x 50' Blue Polyduct Blower Hose [481-4000]](http://www.dbmarinesupplies.com/cdn/shop/files/110094XL_medium.jpg?v=1779987292)
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4" x 50' Blue Polyduct Blower Hose
Trident Polyduct is the most flexible, crush-proof, and rugged blower duct hose for heat, ventilation, and air conditioning* (HVAC)—heavy-duty polypropylene hose, reinforced with a flexible polypropylene rod helix.
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*Meets FMVSS 302 flame resistance
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