This is labelled High Pressure, but when you get it that's defined as 2.5psi. The other HP pumps I've looked at (which were much more expensive) would go to 14psi. I'm blowing up an inflatable dinghy, and it's rated for 4psi, and that's considered low pressure. The high pressure floors in some of them want 12psi. I guess what I'm saying is this didn't live up to my expectations, and really shouldn't be called a high pressure pump. That said, it's reasonably well built, and I think it'll work to get the boat mostly inflated.