Index revision : C - November 20172670304.6. Compensation air diagram25:Thecompensationairpreventsanycontamination of the inner shaping air shroudand is controlled via a remote regulator.4.7. Turbine exhaust diagram25Compensation air - Dia. 6 x 8 - Poly-amide421Turbine exhaust - Dia. 8 x 10 -PolyamideDES0102225OD 5/16" NYLON421DES03086