The Interspiro ultra-light full composite cylinders comes in volume 6.8 Liter with an unlimited service life, ”NLL” — Non-Limited Life. It provides very low weight and reliable construction. The cylinder can be equipped with an optional Cylinder Quick coupling.

There are several options for the cylinder valves: 
Excess Flow Valve (EFV) = Reducing the air flow from the cylinder in case of damage or unintentional opening.
Safety ratchet = Mechanism preventing unintentional closing, "pull-to-close" or "push-to close".
Pressure gauge = Integrated small pressure gauge showing cylinder pressure.
Burst disc = A pressure relief device that protects the cylinder from overpressurization.

The following cylinder valve combinations are available:

• In-line variant with hand wheel pointing straight down from the cylinder.
  1. Basic version
  2. EFV
  3. EFV + safety ratchet
  4. EFV + safety ratchet + pressure gauge
   
• 90° variant with hand wheel angled 90° from the regulator connection. 
  Comes as standard with burst disc, safety ratchet and EFV.
  1. Basic version, push-to-close ratchet
  2. Pressure gauge, pull-to-close ratchet
   
• 180° variant with hand wheel angled 180° from the regulator connection.
  Comes as standard with burst disc, push-to-close safety ratchet and EFV.
  1. Basic version
  2. Pressure gauge

The cylinder is delivered painted yellow. 
Technical specification available below is for empty cylinder excluding cylinder valve.