The Dryer Vent Hose Clamps connect the vent hose of the dryer to the vent duct to remove exhaust from the appliance during operation. This kit includes (2) hose clamps that measure 4" D each. These metal clamps feature a universal design that is compatible with all dryer models. Installing this accessory will require basic hand tools, moving the appliance and novice repair experience. You must unplug the dryer or shut off the house circuit breaker for the appliance before you begin.