3" Blue Polyduct Blower Hose - Sold by the FootTrident 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.Features: Sold by the foot Excellent flexibility & compressibility Excellent resistance to crushing, flex fatigue, tearing, and moisture Stomp on it and it returns to shape without damage Shove it thru tight openings and overheads and it delivers full airflow Application:Rugged blower duct hose for heat, ventilation, and air conditioningSpecifications: Temperature Range: -40AdegF to +225AdegF (-40AdegC to 107AdegC) (when insulated) Inner Diameter (inch): 3" *Meets FMVSS 302 flame resistance Specifications: ID Diameter (inches): 3" Length (Feet): Sold By The Foot Box Dimensions: 3"H x 3"W x 12"L WT: 0.19 lbs