End Style: QF (standard), Flange, Raw
When ordering specify A,B,D.

B + D ≥ A

Use formula above to determine if a reducer is needed at “C”.
Flange Leg: Length=4.5” AND Height=A+4”

If A, B or D desired in flange, add price of flange and denote by FL after dimension for which flange is needed. When ordering specify A,B,D. 

On sizes above 24", "A" is flanged. Add the cost of flange if "B" or "D" require flanges.