I bought this for my Chair Butler "DAM Carp Chair with Armrest" ([...]). Unfortunately, the pipe diameter of the DAM-chair by about 1mm too small (DAM-chair has a tube diameter of 20mm). Property me therefore the Bauhaus a pipe clamp bought, cut the knobs of the rubber of the clamp and inserted the rubber in the pipe holder of the Chair Butler. This holds the Chair Butler on my DAM chair bombproof. The product keeps its promises so far. Hence my 5 stars.
