Professional series dryer vent kit for exhausting gas and electric clothes dryers. Includes (1) 4" wide mouth cap with 4" diameter aluminum pipe (cap is equipped with removable pest screen designed to keep birds and other pests from burrowing in dryer exhaust vents), (1) 4" diameter x 8' long ProFlex transition duct, and 2 plastic clamps with quick release, self-locking system.