Part Number: 2ZVCKT4Kit includes: (1) 4" concentric through the wall termination hood with 3" air intake, (1) 4" x 1' pipe, (1) 4" x 90 degree elbow, (1) 4" universal appliance adapter with built in back-flow preventer and condensation drain, (1) condensate drain tube-kit, (1) 3" x 3' length of combustion air duct with clamps.