... mm 3) Solid bar 4)high quality, best price Base jack ,screw jack,adjustable base jack,scaffolding part1)Material ,Q2352) Size 28,29,30,32,34 ... ,36 mm 3) Solid barThe base jack of our factory is a ... with all types of system scaffolding . Pls feel free to contact us ! IF YOU NEED OUR BASE JACK, PLS CONTACT ME IN YOUR ...