The Rati Armster mounting base is an adapter for installing an ARMSTER-series armrest in 2008–2016 Ford Ka models. It is made of plastic and fits between the front seats. The armrest is not included and is sold separately.
- Type: Armrest mounting base
- Compatibility: Ford Ka, 2008–2016
- Material: Plastic
- Colour: Black
- Maximum supported weight: 80 kg
- Package contents: Mounting base, instructions, mounting screws
- Quantity: 1