Office Chair

Jack workstation chair with medium backrest, available with 3 models of armrest. Also available with upholstered headrest.

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From €258.11


Jack is a workstation chair with medium backrest and with optional armrests; also available with a fixed upholstered headrest. The spoke base is available in black or grey polyammide and polished or painted aluminium.
The wide range of fabric and faux-leather covers available allows for a great customisation, this operative chair is swivel, it lifts-up and comes with a synchronous mechanism to adjust backrest and seat at the same time.

available with optional armrests, fixed or adjustable in height
structure and rear of the backrest in black or grey plastic material
backrest and seat can be ajusted either manually or with mechanism
ideal for the home office or modern and dynamic offices

Model and Measurements
Models: without armrests, with armrests, with armrests and headrest
Measurements: view the measurements in the Menu
- depth: cm d.43
- height: adjustable from cm h.42 to 54

Materials and Finishes
fabric, faux-leather
- polyammide
- aluminium

Technical study

Technical Specifications and Equipment
Swivel and Lift-up Mechanism: each seat comes with a swivel mechanism and a lever on the right side that allows the seat to adjust in height through a gas piston mechanism.
Adjustable Backrest: each seat backrest can be manually adjusted in height and tilted, also separately.
Synchronous Mechanism: it allows to adjust backrest and seat at the same time. The mechanism is activated through the lever placed under the left side of the seat: by tilting the backrest with a small pressure, the seat slides backwards and slightly lowers down; this mechanism has a lock system to block the position. The seat also has a central valve to adjust the backrest tension quicker.
Safety Antishock System: each seat with Permanent Contact or Synchro Mechanism is equipped with an Antishock mechanism that prevents the backrest to immediately go back to the vertical position once released. To move the backrest simply apply a light backward pressure with the back; In this way it will be released and will follow the user back movement to regain the vertical position.

The seats of this collection are crafted complying with European standards in terms of quality and safety. All products have ergonomics and functional requirements meeting standards of law 81/08 and EN 1335 legislation, they all have certifications issued by CATAS laboratory.


Additional Information

Area of Production
Not exportable to the United Kingdom, EIRE and USA.
Easy Assembling
da 17,2 a 19,2 Kg
Cubic Metres
da 0,42 a 0,55 m³
Other Products from the same Collection
View all the products of the collection (diotti.com)

Partner Factory

The design and manufacturing process of diotti.com executive and operative chairs is based in the heart of Brianza district (north of Milan). The whole collection is analysed and tested through a strict quality control to verify that each product follows the most stringent national and international rules in terms of  performance as well as recycling of the materials used.

The contemporary design of each piece is combined to rigorous studies on the correct ergonomics resulting in a selection of versatile seats able to satisfy the most different comfort needs in a working environment.
A firm with more than 50 years of experience in the office department but with an eye on the future with the research on new materials, technically advanced solutions and innovation.

diotti.com is a collection of modern house furniture: high degree of customization, design and 100% Made in Italy manufacturing quality are matched together in unique furniture solutions, contemporary in their design and reliable through time.
diotti.com is the only home design brand available exclusively online: convenient, transparent, always reachable and with the best value for money.

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