hydraulic cylinder 1.high quality seals from USA 2.3/4/5 stages to choose 3.long using frequency hydraulic cylinderbore: 18mm - 250mm stroke: 20mm - 8000mm stage: 3, 4, 5 or 6 stages material: steel of 20#, 40#, 45#, 16Mn, 40Cr, 12CrMo Some of our hydraulic oil cylinder / telescopic cylinder standard series:TG-Type telescopic cylinder1. TG-3E-149-4280Extended stages: 3 stageworking pressure : ...