Foldable test tube rack rvfm ttr 001 p this 8 hole test tube rack is supplied as a flat pack kit of laser cut acrylic parts p p once assembled it measures 140mm long 75mm tall and 48mm wide it has been designed to accommodate test tubes up to 15mm in diameter the holes on the bottom layer are smaller to prevent the test tubes from slipping through to the working surface p rvfm foldable test tube rack