The Amazing SVB5000 Valve.

The critical link between your regulator and tank, our patented Sherwood valve
was designed specifically to handle today's high-performance regulators. (Like
ours!) It's unique features include:
• High air-flow capacity
• An all-Teflon seat, making it the smoothest operating and most durable valve
you can buy
• A specially designed burst-disc assembly that distributes escaping air evenly
so your tank won't spin or tip if your burst disc vents
• Teflon-coated plug threads that mean grease-free lubrication for the life of
the valve
• Designed as a tank handle to make carrying your cylinder easier
• O-ring outlet protected by pressure releasing crimp to resist "pop-out"