Aluminium rind motor to reduce working heat ,24V limit switch, Height restrict device ,Import combination airproof circle 1. Lifting height 1800mm2. 24V limit switch3. Limit switch could cut off power and oil pressure loop when the machine lift to the highest level.4. Single oil jar hidden under course.5. Manual unlocking device,operated easily.6. Each pillar has lock bar7. 450mm lifting height ...