Fully retractable, heavy duty, automatic bollard consisting of an oil-hydraulic motor-pump unit incorporated inside the main structure and an oil-hydraulic actuator inside the moving cylinder. Suitable to meet residential, commercial and industrial requirements and urban applications. IP 67. Height from ground level can be 500, 600 or 800 mm. Scratch-proof S235JRH steel moving cylinder, thickness 5 mm and ø 100 mm, cataphoresis treated and polyester powder coated. Cylinder head made of aluminium with rubber edge, cataphoresis treated aluminium cover plate. Head and cover plate are slip-proof and tread resistant. Moving cylinder fitted with an approved, retro-reflecting, high intensity, micro-prismatic, high intensity adhesive film (h 80 mm), available with No. 4 amber-colour signalling LED lights flashing and radially fitted, 10 m electric cable. Hot-dip galvanized steel pit. Cover plate allowing access to the hydraulic release device for the manual lowering of the bollard by a special spanner in an emergency. Impact resistance 30.000 J, breakout resistance 150.000 J, static load max 1.600 kg (bollard in raised position), max 20.000 kg (in lowered position). Working temperature -40 ÷ +80 °C. Supply voltage 230 Vac ± 10%, 50 Hz. Absorbed power 330 W. Rising time ~ 4,7 s [h 500 mm from ground level], ~ 5,6 s [h 600 mm from ground level] ~ 7,5 s [h 800 mm from ground level]. Intensive use, 2.000 cycles/a day.