Metal Ikea adjustable furniture legs. These were part of a sideboard/TV unit I have long freecycled, and couldn't find at the time!
5.75" / 15cms high at their least extended point
6.75" / 18cms high at their most extended point
22.5" / 58cms long/wide
Collection please, as soon as possible from the Langham end of Elphinstone Road.