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 for the protection of sensitive areas where a high level of perimeter security is needed. Tested and certified in compliance with ASTM F2656-18A C730, PAS 68:2013 V/7500 (N3)/48 and IWA 14-1:2013 V/7200 [N3C]/48 Norms. IP 67 and designed to withstand, in a single bollard configuration, a vehicle of 7,5 t at a speed of 48 km/h. Height from ground level is 1.000 mm. Scratch-proof S355J2H steel cylinder, thickness 12 mm and ø 275 mm, cataphoresis treated and polyester powder coated (an AISI 304 brushed stainless steel cover sleeve available). Cylinder head made of aluminium fitted with rubber edge and 12 amber-colour integrated LED lights, burglar-proof 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 adhesive film (h 80 mm). Hot-dip galvanized steel pit. Release spanner with a triangular socket allowing manual lowering in an emergency. Impact resistance 250.000 J, breakout resistance 750.000 J, static load max 1.500 kg (bollards in raised position), max 20.000 kg (lowered). Working temperature -40 ÷ +80 °C. Supply voltage 230 Vac ± 10%, 50 Hz. Absorbed power 1.850 W. Rising time ~ 5,00 s. Intensive use 2.000 cycles/a day.