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Product family

Backrest & Headrest Mechanisms

Five products for sofa and armchair manufacturers: three CSS connection sets, a sofa backrest adjustment mechanism and a 6-position headrest hinge. This page sets out what each one does, where the CSS sets differ from one another and what to include when you ask for a quote.

What each one does

CSS connection sets

A connection set that carries the opening and closing movement of a seat. The link arm is screwed to the timber frame, and the joint bolt passes through the point the arm turns around and is tightened into the nut plate behind. All three types fit the same way; they differ in kit contents, material grade and surface finish. The name is also often written "CCS".

Sofa backrest adjustment mechanism

Moves the backrest forward and backward to change the seat depth. Pulled forward by hand, the back moves to the sitting position; pushed back, it moves to the relaxing position that deepens the seat, and it rests in one of these two end positions, with no steps in between. Scissor arms on each side connect the back to the frame, and two steel tubes join the left and right units. It is made with L22 and L26 tubes; how many sets a sofa needs depends on the width of the back.

6-position headrest hinge

Fixes the head support at six separate angles, 15 degrees per step. As the headrest is pushed forward the steps engage in turn; after the last step the headrest is released and returns to its starting position. How many are used depends on the width of the headrest. In the trade it is also called a headrest mechanism.

CSS 3, CSS 4 and CSS Lux: where is the difference?

All three do the same job and fit the same way. CSS Lux and CSS 3 come with exactly the same parts; the difference between them is the level of material grade and surface finish. CSS 4 comes with a different kit.

Feature CSS 3 / CSS ECO CSS 4 CSS Lux
Product Code ZM6-005 ZM6-003 ZM6-004
Other names CSS ECO, barcelona — —
Link arm, long mounting screw, joint bolt yes yes yes
Roller cap — yes —
Short stud and corner cover plate yes — yes
Nut plate multi-nut single-nut multi-nut
Material steel steel steel
Where it is chosen Economy segment: high-volume runs, budget-driven projects, rented and short-term spaces Seating used every day: offices, homes, waiting areas Upper segment: showrooms, bespoke projects
  • The roller cap (CSS 4 only) fits at the pivot and stops metal rubbing directly on metal; it is the part that reduces squeaking and wear.
  • The corner cover plate (CSS Lux and CSS 3) is a pressed sheet with three holes; it closes off the joint, spreads load over a wider area and reduces strain at the fixing point.

We do not publish figures such as sheet thickness, coating thickness or cycle life without verifying them, which is why they are not in the table.

Products in this family

What to include in a quote request

  1. The product and its code — for example CSS 4 (ZM6-003).
  2. Quantity: how many sets; for series production, the approximate batch size.
  3. For the backrest mechanism: L22 or L26, and the width of the sofa back — we work out together how many sets you need.
  4. For the headrest hinge: the width of the headrest; the quantity depends on it.
  5. If you are asking about a non-standard size or finish: a dimensioned drawing or a photo of the part you have.
  6. Delivery point: city, and country if outside Türkiye.

Send us sizes and quantities and we reply the same day.

Get Quote Contact via WhatsApp E-Catalog

Ordering from outside Turkey? Send a photo or drawing, the quantity and your destination country on WhatsApp or by email, and we will reply the same day. We already ship to Russia, Georgia, Iraq, Syria and the Balkans.

Knowledge Base

Guides for this family

All guides
Types of Sofa Mechanisms: Which One for Which Project? Guide

Types of Sofa Mechanisms: Which One for Which Project?

Backrest adjusters, CSS opening kits, rotating tables and fittings & connectors: a starting guide to what furniture mechanisms do and which one belongs in your project.

5 min read Read guide
CSS 3, CSS 4 and CSS Lux: What Is the Difference? Comparison

CSS 3, CSS 4 and CSS Lux: What Is the Difference?

Where the difference between three members of the same family actually sits, how their kit contents diverge, and which one belongs in which project.

4 min read Read guide
How Does a Backrest Adjustment Mechanism Work? Two Positions and Scissor Arms Technical

How Does a Backrest Adjustment Mechanism Work? Two Positions and Scissor Arms

The parts of the mechanism that moves the back forward and backward to change the seat depth, its two positions, how many sets a sofa needs, and what to watch during upholstery.

3 min read Read guide
Maintenance and Lifespan of Sofa Mechanisms Maintenance

Maintenance and Lifespan of Sofa Mechanisms

Simple maintenance steps that extend the life of CSS and backrest mechanisms, and points to watch out for.

2 min read Read guide