Dust Right 2-1/2'' Rubber Union for Dust Collection w/Pair of Clamps - Hose Coupler Eliminate Flimsy Duct Tape Connections - Dust Collector Flexible Rubber Makes Airtight Seal - Hose Clamp & Hanger

Woodstock W1044 4-to-2-1/2-Inch Reducer

POWERTEC 70149 Dust Control Flex Cuff with Hose Clamps, 4-Inch

Dust Right 4 in Rubber Union for Dust Collection

2-1/2 in to 2-1/4 in Conversion Port

POWERTEC 70136 4-Inch to 2-1/2-Inch Cone Reducer

POWERTEC 70141 2-1/2-Inch to 2-1/4-Inch Reducer

POWERTEC 70127 2.5-Inch Key Hose Clamp, 5-Pack

POWERTEC 70129 2-1/2-Inch x 10-Foot Flexible PVC Dust Collection Hose, Clear Color

POWERTEC 70178 Elbow, 2-1/2"

Big Horn 11741PK 4-Inch Key Hose Clamp, 5-Pack, Colors may vary