... swivel screw jack base 1)material ;Q235 2)OD size:28mm,30mm,32mm,34mm,36mm,38mm 3)solid and hollow bar adjustable swivel ... screw jack base we can offer the products to you as ... Price Prompt Delivery Quality Approvals Small Orders Accepted1)name: swivel base screw jack 2)material:Q2353)ODsize:28mm,30mm,32mm,34mm,36mm ...