DIR D-12 Halcyon Concave


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Our well-known Halcyon-Deepstop -DIR D-12 Twintanks Concave


The Cylinderstyle Steel D12 long Halcyon Concave allows the cylinder to stand vertical on its own, without requiring a plastic boot.

The new bottom shape results in some extra weight compared to a classical cylinder (+0,6kg).

Such additional weight can be a beneficial for balancing twinsets. Especially coldwaterdivers with thick undergarments can dive that set with no additional or minimum lead.

Tailweights are not necessary for these tanks anymore.

The Twins consists of 2 x 12 liter long steel tanks, with concave bottomshape,

Manufacturer: Eurocylinders, weight about 14kg per bottle, depending on the series.

The bottles have CE, are "Breathing gas " stamped, so oxygen clean, have TUV and Declaration of Confirmity.

The TÜV-certificates and Decl.of confirmity are either at, or can be downloaded by means of the bottle numbers in the BTS website


Our twins are supplied with the well-proven V4tec Stainless Steel Precision tankbands, with screws, washers and wing nuts .

The devices are expertly assembled with us, so that the bottles are parallel and in a plane .

We will pack the bottles in special cartons and deliver them with UPS, DHL or international courier on pallet.

The Halcyon valves have CE, DIN G5/8 DIN connection with a M25/2- thread for bottle, are Oxygen Clean, and have a very high production quality.

The device is mounted, and always delivered with TÜV and Decl.of Confirmity.


We supply all Twins with a highly reflective name-label, we enclose for mounting.

Please specify at checkout in the text field, what should we print!


Sehr gutes Doppelpack,leicht gängige Halcyon Ventile.Top

  • 1 out of 1 people found this review useful.

Habe beim ersten TG gleich die optimale Wasserlege gehabt ohne mit zusatzblei anbringen zu müssen.
Top Lieferservice.

  • 1 out of 1 people found this review useful.

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DIR D-12 Halcyon Concave

DIR D-12 Halcyon Concave

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