Made of red para natural rubber, compliant with DIN 12871. Low sulphur, floating, non-toxic. Technical data: Closure / lid suitable for bottles / vials; type of closure / lid: plug; closure suitable for bottle / vials type: SML; flange closure type: SML; cap suitable for threaded bottle type: SML; height: 40 mm; shape: conical; suitable for autoclave; diameter bottom: 41 mm; diameter top: 49 mm; mid diameter: 46 mm; colour: red; plug material: natural rubber.