Yes I have looked at their website and I have used their N Butane before. It is in a local head shop by my home in Colorado, and my home in Ohio, and it makes extremely good honey oil. Not such a bad company to be affiliated with. In fact, I think their N Butane can be purchased in most headshops/smokeshops that carry high quality butane (which is what us growers are looking for in MASS quantity).
Go to twisted Labs website, guarantee their N-Butane is sold out. Soon as they get it in stock its being purchased by headshops and smokeshops across the country.