i'm upgrading to 15lbs bottles. one is a NX bottle with pressure gauge and no nut. second bottle is a ny-trex bottle with gauge and nut. $100.00 each + shipping. i had them painted black. as you can see, there are a few chips in them.
http://stealthram.com/familypics/for...ackbottles.jpg
http://stealthram.com/familypics/for...ckbottles1.JPG