This duct kit will work with the CSA-400-CAT and the CSA-600-CAT afterburner systems. The kit will typically include: (1) cyclone to duct connection wide clamp, (1) short duct, (1) reducer duct, (2) 90 degree elbows, (1) 45 degree elbow, (1) straight duct section, (1) expansion duct with o-ring, (7) stainless steel clamps, (1) o-ring. Additional items are available at extra cost.