This Dryer Telescoping Vent Periscope measures 0" L to 18" L and is designed to use in small laundry spaces with 2-1/2" clearance. It features one male snap-lock fitting and one extra long draw-band collar for easy installation; excess length can be trimmed to fit. The beveled ends of the item prevent interference with or damage to floors and wall. Please check your appliance's use and care manual to ensure this is correct for use with your appliance. Installing this vent will require basic hand tools and novice repair experience.You must unplug the dryer or shut off the house circuit breaker for the appliance before installing this Accessory.