Bought one of these a couple years ago, Not DOT certified but that doesn't matter to me. Build date was 3 months old. Two gauges that seem to be accurate, male foster for filling the bottle, female foster that fits every male fitting I have and a really smooth valve. If you're wondering about a mfg date email them, I did. Solid unit and recommend this if you are looking for a small bottle to fill yourself.
www.fieldsupply.com

Hatsan TactAir 1.6L CF Fill Tank w / Valve Kit
Features: 1.6L (98 CI) Carbon Fiber Composite Tank 4500 PSI Max Fill Pressure 11% Increased Capacity Over Similar 88CI Units Includes Fill Valve w/ Dual Pressure