Office chair by Hag, Conventio 9512 model.

Modern and linear design characterize this office chair with handle on the backrest.

The five-star base is made of black plastic, while the aluminum structure is available in a silver or black finish. The front part of the backrest and seat are padded and covered in fabric, while the back is in black plastic. The optional black plastic armrests complete the design of the office chair making it more comfortable.

Thanks to the BalancedMovementMechanism , the front edge of the seat tilts up when leaning back and down when leaning forward. This stimulates movement in the ankles and activates venous pumping mechanisms in the lower legs, increasing blood circulation throughout the body.


  • Seat height: 40-54cm
  • Seat width (excluding armrests): 43 cm
  • Seat depth: 43cm
  • Five-star base: Ø 63.5 cm.


  • EN 16139 (version without armrests)
  • gs.

Upon request, this model is also available in the version with fully upholstered seat. Contact Customer Service for information and quotes.

Standard dimensions
  • Depth 43 cm
  • Width 43 cm
  • Seat height 40-54 cm
  • 8.3 Kg
Technical data and additional details
  • Requires assembly
  • Recyclable
  • 10 years warranty

Certifications legend

  • UNI EN 1335:2020: European standard that defines the size and safety requirements for seats that can be used for office workstations. European standard tests based on use for eight hours per day by people weighing up to 110 kg.
  • UNI EN 16139: European standard which defines the resistance, durability and safety requirements for office and waiting room seating. Maximum capacity 110 kg.
  • UNI EN 1729: European standard that defines the size and safety requirements of seats that can be used in educational institutions.
  • GS (Geprüfte Sicherheit): safety certification in accordance with German law.

Wheels supplied

In the standard version, this seat is equipped with soft wheels, suitable for hard floors (e.g. parquet, concrete, ceramic), Ø 50 mm.

On request, hard wheels are also available, suitable for soft surfaces (rugs, carpets), Ø 50 mm. When ordering, specify in the notes if you want wheels for soft floors.

Shipment and delivery time
  • express delivery

    This product is immediately available in the specified quantities and variants and it will leave our warehouse within 24 hours after order confirmation.


  •   35 days for production


  • forwarding (from 2 to 7 working days)

If payment is done during the following days, time of delivery starts from the payment date.

Delivery date is an estimate and can not be considered binding for Sediarreda srl.


Delivery times vary according to the chosen covering:

  • Coatings category 1 (Cura, Xtreme): 4 weeks
  • Upholstery in higher categories: 8 weeks.
Discover the brand

Born in 1943, the Håg brand produces office chairs designed around the idea of “dynamic ergonomics”. The Håg chairs are designed to keep your body moving even when you sit for a long time at your desk. Therefore, they improve your psychological well-being and your productivity.

Today the brand belongs to the Flokk Group, a house of brands specialising in office furnishing.

Conventio 9512

HÅG office chair with upholstered seat and back, optional armrests
663,70 € -10%

597,30 €

Combination terminated
  • Express Delivery
    Delivery scheduled from 29-02-2024 to 06-03-2024

  • Available
    Delivery scheduled from 03-04-2024 to 09-04-2024

Business solutions

Do you require a quote or a consultation for your professional activity?

Our Customer Service can help you find the right solution.

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