View on LOZ Suggested Retail: $25.99. Hon&Guan 8 inch 16 FT Long Air Ducting, Heavy-Duty Four-Layer Protection Dryer Vent Hose for Heating Cooling Ventilation and Exhaust-with 2 Clamps, Black. LOW NOISE SILENCER: designed for reducing noise from fans and carbon filter systems, can decrease the noise by up to 50%. 8'' DUCTING LIGHTPROOF: Thick layer of Black PVC on Hon&Guan ducting prevents light leaks. Works with exhaust and intake fans, carbon filters and hooded lights which are 8'' in diameter.. 7 CALENDAR DAY FULL REFUND GUARANTEE ON THIS ITEM IF ANY ISSUE IS FOUND THAT WAS NOT DESCRIBED/PICTURED. 7 CALENDAR DAY STORAGE IS ALSO AVAILABLE. SEE NOTES TO BIDDER, IN AUCTION DETAILS, AT THE TOP OF PAGE 1 FOR MORE INFO.