Cressi MC9 Manuel D'instructions page 77

58 SECOND STAGES
WARNING: intermediate pressure must be set only at
authorized Cressi-sub centres, while the setting values can
NOT and must NOT be modified by the user, in order not to
affect the regulator' s performance. Cressi-sub decline any
responsibility for any intervention carried out by unauthorized
personnel.
You can find your authorized Cressi-Sub center by
asking your dealer, or Cressi Sub S.p.A. itself (email:
info@cressi-sub.it).
Inner components are in chromium-plated brass, stainless steel
and acetyl resins; springs are in stainless steel, diaphragms in sili-
cone, O-rings in NBR and the mouthpiece in comfortable
hypoallergenic silicone.