Cylinder is welded to the base, assuring strength and eliminating leaksChromed pump piston and ram for added rust resistanceExtension screw gives added height when necessarySuper low minimum height for easy accessMeets ANS/ASME PALD & CE/GS standardsMeasurements: Height: 6" Length:13" Width: 5"Min height: 148mm /5.8" Max height: 256mm /10"Weight: 9.5kg/21lbs