This is the Cressi START-ER PRO Scuba Diving Package This package inlcudes: B.C.D. START PRO 1ST STAGE MC9 - 2ND STAGE COMPACT OCTOPUS COMPACT MINI SPG CONSOLE Features: For BCD Start: -500 denier cordura (exterior) and 420 denier nylon (interior)- External ballast-carrying pockets with quick-release safety buckle- 2 very big multipurpose zip pockets- ultralight rigid backplate with carrying handle.- 3 pressure relief valves.- Four 40 mm engineering plastic D-rings (2 on the shoulder straps and 2 on the lower part of the air cell.- Two 25mm engineering plastic D-rings on the pockets.- Size indicated clearly on the shoulder strap.- Shoulder straps with 50mm buckles. For 1st stage: -Balanced diaphragm (seal chamber for MC9SC)- 2 outlets HP 7/16 UNF- 4 outlets MP 3/8 UNF- Service pressure: 300 bar (4350 psi) DIN version,-232 bar (3365 psi) Yoke version- Calibration pressure: 10 Bar- Brass body Electroless Nickel plated- High capacity conical filter electroless nickel plated- Aisi 316 removable nozzle- Hyper-balancing- Anti-pressure drop pneumatic spring- Setting spring: stainless steel with micropeening treatment- Replaceable cylinder with anti-friction and anti-corrosion properties- Elastomer protector- Flow rate: 4500 l/min- Yoke version weight: 590 gr- Din version weight: 450 gr For 2nd stage: - Downstream system- Adjustable venturi effect- Patented antifriction lever- Big purge button- Anti-scratch surface- Bayonet-type cap holder with security lock- Removable exhaust tee- Weight without hose: 135 grCOMBINATION PERFORMANCE- Average Cracking effort 6 mbar- Average breathing effort 1 J/lJACKETED HOSE extremely light and flexible weight: 153 grCERTIFICATION EN250/2000 For octopus: Same as Compact 2nd stage For Mini SPG in PSI: Case material: chromium plated brassEnd scale: 5000 PSIFace: luminescent with colored sectionsPressure release valve: incorporatedInstrument diameter: 50 mmHeight of case: 14 mmTotal instrument height: 17 mmHose diameter: 11 mm