SIGMA is a chain operated flyscreen made of fibreglass mesh, fitted with the unique clic-clak® system, an International Bettio Patent that allows opening and closing the flyscreen by simply pulling the chain. The perfect combination between the chain drive system and the advantages of the spring system makes it an ideal product, characterised by smooth operation and perfectly stretched mesh at any time. Sigma is a built-in flyscreen that vanishes completely in the window frame. For installation, use the adjusting profiles already included with the product. Standard control is on the right. The standard bracket and support spring make it easy to install on the construction site or directly on the window frame during manufacture.


Vertical sliding;




Chain operated;


Width adjustment from 38 to 50 mm


50 mm






  1. Box
  2. Support spring
  3. End cap
  4. Connector
  5. Chain stopper
  6. Adjusting profile (min 38 - max 50mm)
  7. Upper side rail
  8. Mesh with PVC strip and pins
  9. Handle bar
  10. Clic-clak® shoe with rod
  11. Wall-mounted chain tensioner
  12. Adjusting profile with brush
  13. Clic-Clak® shoe
  14. Joint for chain
Box Minimum sizes Maximum sizes
50 400 x 400 mm 2000 x 2700 mm / 2500 x 1800 mm

For widths below 800 mm and height over 1800 mm, contact the company for the maximum possible height.

If the ordered measures exceed the maximum granted ones, some or all of the pins might be removed after carrying out the technical feasibility check so that we can manufacture the screen. In such case we cannot grant the resistance of the mesh to the wind push.

Ral 9010 Matt
Ral 9010 Gloss*
Silver Painted
Ral 9001 Matt
Ral 1013 Matt
Bronze Painted
Testa di Moro 2001 Matt
Elox 2000 Matt
Ral 6005 Matt
Renolit Light
Renolit Dark
Ral 8017 Matt
Brushed Silver
Ral 7016 Matt

Grey accessories. If you opt for Bronze, 9001, 9010 or 1013, some of the parts will be supplied in matching colour. The colour of the accessories in special shades is at the discretion of the Company.

* Standard colour unless otherwise mentioned on the order form.

Some chain-operated versions also feature the clic-clak® system, Bettio’s original international patent that allows opening and closing the flyscreen with a simple pull of the chain, ensuring excellent technical performance that combines ease of use with great aesthetical performance, thanks to the mesh that is always perfectly stretched.
The specially designed adjusters allow the screen side rails and "u" profile to be fixed directly to the door or window frame during manufacture (fixing type 1) or to the bottom of the counter-frame on the construction site (fixing type 2).
Allows built-in screens to easily be installed on the construction site.
This accessory allows fixing the box of the flyscreen directly to the door or window frame.
We created two special side rails (80 and 90mm wide) consisting of two sections that allow us to easily combine the flyscreen system and the roller shutter system: the first section is fitted with brushes and a special conveyor for roller shutter sliding (14x55 mm profile) and the second one allows the insertion of 50 mm built-in flyscreen systems, such as Delta, Sigma, Omega, India, Africa, Miniscenica®Incasso. This special rail is fitted with a housing that allows easy installation of all our built-in flyscreens that do not exceed 50 mm, including lateral flyscreens that require anchoring systems at the top. Models India and Africa use lower adjusting profile for installation.

An integrated system that enriches any house with its high quality finish.

We try to meet all the requirements with our built-in system. This aluminium bracket connects the door/window frame and the blind, leaving enough space for the installation of our 50 mm built-in systems. This way we can assemble the whole system during manufacture and then simply mount the assembly and the window/door frame, the flyscreen and the blind, gaining significant time.

Available in packs of 30 pieces.

Dimensions: 131 x 64 mm.

Supplied as an optional solution, this device allows you to control the flyscreen from both sides.

Long chain.

Control on the left.


Patented technological features
for everyday life.

The importance
of flyscreens.

A strategic ally
for your family

your dealer

Authorised dealers,
quality service.