Air Duct 'A' (p/n 071) fits 35(D1-D4865). Straight duct 3" dia. x 4 5/8".
Air Duct 'B' (p.n 072) fits 33(CD1-300). H35-M35(D4866-6561). Duct with flange 3" dia. x 1 3/4".
Air Duct 'C' (p/n 073) fits 33(CE1 & Up). 35(D7310 & Up) & 36. Straight duct 3 1/2" dia. x 3 3/4 " length, with drip tube.
