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AK 3+4 PET Felt Room Dividers Designed by De Vorm


AK 3 and AK 4 are two functional room dividers with distinction in height. The dividers create flexible walls, bringing structure to open spaces. AK 3 + 4 can be placed freestanding, ceiling-suspended or connected with hinges. The choice is yours. With outstanding acoustic performance and a variety of bespoke options, the AK family offers a universal solution for open-plan interiors.

Choose your own

The room dividers come in 2 sizes - 160 and 180 cm high, both available in a hanging and standing format. You can choose from 11 PET Felt colour blends. The hanging AK 3+4 has adjustable cords. For the standing version, you can also customise the feet colour.  

Acoustic performance 

Thanks to PET Felt and acoustic filling, the AK 3 and AK 4 room dividers offer sound-dampening properties. The acoustic values may vary depending on the space and application of the panels. Find the full report on their acoustic performance in the Downloads

PET Felt colour blends


AK 3+4 in projects

AK 3 and AK 4 are suitable for a wide range of applications in offices, co-working zones and open spaces. We are always curious to see our products in completed interiors. Have you seen or used the AK dividers in any projects? Please, let us know

PET Felt Technology

AK 3+4 room dividers are made from PET Felt - a sustainable and durable material manufactured from recycled plastic bottles.

PET Felt is a soft, though strong material with a great acoustic performance. It is both recycled and recyclable. The PET Felt technology allows a number of production steps to be reduced to one smart 3D pressing technique. 
The AK 3+4 are also easy to disassemble and recycle after long-time use.



  • Panel
    PET Felt
  • Filling
    Honeycomb paper core
  • Fixture
    Powder-coated steel

PET Felt


Technical details

  • Weight
    AK 3 Standing version: 11 kg
    AK 3 Hanging version: 9 kg

    AK4 Standing version: 12 kg
    AK4 Hanging version: 10 kg


  • Seat and backrest
    Yellow, Pink, Marine, Turquoise, Dark Green, Green, Dark Grey, Olive, Beige, Light Grey, Brown*

    *Due to the recycled content of the PET felt, minor colour differences may occur. 
  • Fixture
    Standard: Black (RAL 9011) with 70% gloss degree
    Custom: any RAL colour
    Fine texture: RAL 1012 (Yellow PET), RAL 3005 (Pink PET), RAL 5008 (Marine PET), RAL 5020 (Turquoise PET), RAL 6007 (Dark Green PET), RAL 6020 (Green PET), RAL 7015 (Dark Grey PET), RAL 7033 (Olive PET), RAL 7044 (Beige PET), RAL 7045 (Light Grey PET), RAL 8014 (Brown PET), RAL 9011 (Graphite Black)
  • Cushion (optional)

Hi-Res images


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