A superior alloy makes a superior aluminum scuba tank.

XS Scuba Gas Cylinders offers a broad range of high-pressure aluminum scuba cylinders.

More than 50 years ago, XS Scuba developed the world’s first aluminum scuba cylinder in collaboration with the legendary Jacques-Yves Cousteau, inventor of the original Aqualung equipment that revolutionized underwater diving.

In 1988, XS Scuba introduced scuba tanks manufactured from L6X, a proprietary formula of aluminum alloy 6061-T6 developed by XS Scuba metallurgists to provide superior corrosion resistance and dependable performance in the most demanding underwater environments.

Compared to conventional alloys, L6X has been optimized to improve durability, fracture toughness, and resistance to cracking and tearing, even under high pressures over long periods. More than 50 million XS Scuba cylinders manufactured from L6X alloy have an exemplary record for safety, long service life, and reliable performance.

XS Scuba Aluminum Cylinder Specifications

Metric* 

In Sea Water 

with Valve

AL06

AL08

AL13

AL19

AL30

AL40

AL50

AL63

AL80

AL80

AL100

Colors

Yellow

Red

Yellow

Yellow

Yellow

No Coat & Yellow

Natural & Yellow

Black, No Coat, Blue, Green, Natural, Purple, Red, Shot Blast, White, Yellow

No Coat

Thermo PRO Valve

Black, No Coat, Yellow

Valve Included

Thermo K Valve

XS Scuba PRO Valve

Thermo K Valve

Thermo K Valve

Thermo K Valve

Thermo K Valve

Thermo K Valve

Thermo K Valve

Thermo K Valve

Thermo PRO Valve

Thermo PRO Valve

Service Pressure

207 bar

139 bar

207 bar

207 bar

207 bar

207 bar

207 bar

207 bar

207 bar

228 bar

228 bar

True Capacity

0.9 liters

1.5 liters

1.9 liters

2.9 liters

4.3 liters

5.7 liters

6.9 liters

9.0 liters

11.1 liters

10.3 liters

13.2 liters

Buoyancy - Full

-0.63 kg

-0.68 kg

-0.80 kg

-0.60 kg

850 liters kg

-0.32 kg

-1.13 kg

-1.10 kg

-0.80 kg

-2.59 kg

-2.10 kg

Buoyancy 

(500 psi)

-0.45 kg

0.90 kg

-0.40 kg

-0.05 kg

-0.68 kg

1.13 kg

0.36 kg

0.77 kg

1.54 kg

-0.40 kg

0.86 kg

Empty Weight

1.2 kg

1.72 kg

2.7 kg

3.6 kg

5.6 kg

6.9 kg

9.7 kg

12.2 kg

14.3 kg

16.0 kg

18.6 kg

Outside Diameter

81 mm

111 mm

111 mm

112 mm

133 mm

133 mm

175 mm

184 mm

184 mm

184 mm

203 mm

Cylinder Length

283 mm

274 mm

333 mm

472 mm

490 mm

625 mm

483 mm

555 mm

662 mm

655 mm

665 mm