The PMP-4 is a small pumpThat is big and features with a strong dual head design,The pump can keep up with bigger pumps while saving you space. All aluminum barrel construction ensures long life and smooth operation. SoftTouch grips and a flip-out handle make it easy onThe hands.The PMP-4 is Presta and Schrader valve compatible and includes mounting hardwareTo securely attachTo water bottle bosses. Max. pressure: 90 psi / 6 bars
Though rated for 90psi it is nearly impossible to achieve anything over 55psi with this pump. It is also nearly impossible to properly connect the pump to the valve and nearly impossible to remove the pump from the valve without damaging the valve stem. I have destroyed two tubes by using this product. Don't make the same mistake.