SawStop TSG-FDC - FLOATING OVERARM DUST COLLECTIONBlade Guard Dimensions 3 1 2 x 18 1 2 "Distance between blade and end of extenion table 35 3 4 to 68 " "Inner Dust Tube Diameter 3 Outer Dust Tube Diameter 4 " "Outer Dust Tube height above table 13 1 2 Outer Dust Tube height above floor 33 1 2 to 50" Above Table Dust Collection The large 4" tube allows for high air volume and above table dust collection keeping harmful dust out of your shop. A dedicated 4" extraction port increases dust collection