Larger barrel version pumps more air volume for mtb riders. Large integrated 1 1 8rdquo diameter easy to read analog gauge provides the perfect inflation every time. Dual action da doubles volume with each stroke and inflates tires up to pressure fast. Integrated dust cap keeps pump head clean and thumb lock lever insures air tight seal. 2020 bicycling magazine editor choice for the best high volumn mini pump. Dual action technology delivers air on the push and pull stroke to inflate tires 2x faster. Large integrated 1 1 8rdquo diameter easy to read analog gauge side mount bracket head presta schrader dunlop with integrated dust cap barrel aluminum thumb lock handle polymer capacity 60 psi 4 bar 1 1 8rdquo analog volume per stroke 82 cc pull push added features dual action pumping headside mount bracket size 25.3 x 4.6 x 3.4 cm 10rdquo x 1.8rdquo x 1.3rdquo weight 152 g 5.36 oz