Konas standard pump. A very good and robust pump.
This pump is included when you buy Beach or Core Air SUP from Kona.
This is a double-action pump. The advantage of a double-action pump is that you quickly get up in pressure by pumping both on the up and down movement.
Depending on how you like it, you switch to single-action pumping, at about 7-9 psi, to top the board's pressure.