'ELEPHANTS FEET' chair / table height adjusters... (Cherwell Heights OX16)

Just changed our armchairs so these are now available. Sturdy plastic, 10cm high overall giving [approx] 6cm of extra chair height in its lowest position. An adjusting screw function adds a further 6cm [approx] of additional height if needed. The leg/foot socket will accept a diameter of 6.5cm...