A complete doubles package with of: Two cylinders, 200- or 300-Bar Nitrox-Ready Thermo Manifold with Isolator, Dive Rite® Bands and Bolts Left and Right Manifold Port Plugs.

Your cylinder ships with a few PSI pressure of oxygen compatible air necessary to keep the interior dry. The cylinders have a current month Visual Inspection Sticker and are clearly marked for Oxygen Service. Cylinders arrive with modular valves and plugs installed, ready-to-use as independent single cylinders and Ready-to-assemble as doubles. Assembling a set of doubles is easy if you follow our detailed instructions we provide.

to read Assembling Double Cylinders.

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Independent Twins Are Not Doubles

In the U.S., twins is the word usually applied to two cylinders whose gas contents are not connected together in any way. Independent twins systems are especially handy when traveling and only rental single cylinders are available. Doubles is the word usually applied to two cylinders when they ARE connected together via a manifold to form a single gas source. Outside the U.S. the words 'twins' and 'doubles' may be used interchangeably. Describing twins as independent is a bit redundant, but does emphasize that they are not connected. Describing doubles as independent refers to using them with the manifold isolator closed during normal operation. Keeping two different gas mixtures in either twins or isolated doubles is considered an unsafe practice by many because of the risk of inadvertently breathing the wrong mix.

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Pricing for Doubles Packages

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Doubles Package for Cylinders

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Independent Twins Are Not Doubles

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Pricing for Doubles Packages