base jack ,adjustable base jack 1)Material ,Q235 2) OD Size 28,29, ... 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 high quality cost effective ... with all types of system scaffolding . Pls feel free to contact us ! IF YOU NEED OUR BASE JACK, PLS CONTACT ME ...