Topeak Mountain DA G Bike Pump Topeak Mountain DA G mini pump with large barrel uses Dual-Action (DA) to double the volume with each stroke, inflating to pressure fast. Integrated 1-1/8 in. diameter analog gauge is easy to read. Dual-Action pump head adds air on the push and the pull, saving time and effort; 82cc volume per stroke on push and pull Pump head accommodates Presta, Schrader and Dunlop valves; integrated dust cap helps keep it clean Polymer thumb-lock lever ensures an airtight seal Aluminum barrel Side mount bracket compatible with all Presta, Schrader, and Dunlop valves Maximum Pressure (psi) 60 pounds per square inch Approximate Dimensions : 10” x 1 6/8”x 1 1/4”