The vx is an extra light composite frame pump with dual head for all valves high volume per stroke available in 5 different lengths to fit all frame sizes frame size 42 47cm vx 1 345 395mm frame size 48 53cm vx 2 400 450mm frame size 54 58cm vx 3 455 505mm frame size 59 64cm vx 4 510 560mm frame size 65 69cm vx 5 565 615mmmax pressure 8 bar 115 psimaterial plasticcolor blackweight 98 gvalve av sv dvoutput max 6 bar 87 psilength