I have an 20 Cubic Foot N2 Tank (empty) with a HD Adjustable Regulator and Poly Performance fill gauge. Also include an adjustable coilover spanner wrench. The entire setup is over $250 from Poly Performance. Asking $150, located in Gardendale, AL
http://www.polyperformance.com/shop/Poly-Performance-Nitrogen-Kit-p-56.html
http://www.polyperformance.com/shop/Poly-Performance-Nitrogen-Kit-p-56.html