Round HVAC Ventilation Duct Cleaning Solution 12 FeetDescription The HVAC ventilation duct cleaning solution is designed for cleaning the exterior of round ventilation duct located up to 12 feet from the floor or elevated platform. Includes a 63 anodized aluminum wand with a durable steel collar which fits industry standard 1. 50 hose cuffs as found on commercial backpack vacuums and commercial canister vacuums with 1. 50 accessories. The wand has a 45 degree bend at one end that finishes with an