You need: 4x `campingstuhl_standfuß.stl` - for the feets 2x `campingstuhl_halter_oben.stl` - for the upper backside 1x `campingstuhl_halter_oben_vorneR.stl` - upper front right (when you sit in the chair) 1x `campingstuhl_halter_oben_vorneL.stl` - upper front left 20x M4x35/40 cotter OR screws and nuts These connectors will certainly not fit on every chair, but at least on mine they do ;D The rods are ~16mm.