Base Jack Variety:Solid, HollowOD size:28mm,30mm,32mm,34mm,36mm,38mm ... :28mm,30mm,32mm,34mm,36mm,38mm4).Surface: hot dip galvanization,electrical galvanization, dip painting5).Package: we can do Steel pallet or ... *5mmOEM Service is available.ISO9001 :2008 approved EG screw base jack