4 inch 90 degree cobra head (1) 4 inch Series 9000 Precleaner adaptation kit for 3 inch, 3.5 inch or 3.75 inch inlets (1) 4-inch diameter x 8 feet flexible hose kit (with flange adaptor, reducing insert, sealant & screws (1) 4-inch to 3.5-inch rubber reducing insert (1) 4-inch to 3.75-inch rubber reducing insert (1) 4-inch to 3-inch rubber reducing insert (1) 5-inch to 4.5-inch rubber reducing insert (1) 5-inch to 4-inch rubber reducing insert (1) 6-inch to 5-inch rubber reducing insert (1) 7-inch to 6-inch rubber reducing insert (1) 8-inch to 13-inch Flanged Metal Expansion Adaptor Kit (1) 8-inch to 7-inch rubber reducing insert (1) Flange adaptor with 4-inch pipe to penetrate HVAC fresh-air plenum (1) Series 9000 4-inch 90 degree rubber elbow (1) Series 9000 4-inch to 3-inch 90 degree reducing rubber elbow (1) Series 9000 Precleaner 4 inch universal mounting kit (1) XLR 4-Inch Flange assembly (1)