3 1/2" diameter, (4) 4' straights, (4) 45's, (4) 90's, (4) 180 degree bends, all expanded to id fit on one end. All 304 s/s construction using only mil spec certified USA manufactured tubing. 16 gage (.065) wall thickness tubing, CNC mandrel bent. One end of each piece expanded for an ID slip fit.