Spare screw top lids for Simax® Screw Top reagent bottles. Red with PTFE seal. Autoclavable / dry heat sterilisation to 200°C. GL45 screw thread.Colour: RedPack of 10Suitable when combined with Simax Bottles for concentrated acid storage (e.g. Nitric Acid). Please note the Pouring Ring must be removed from the Simax bottles in order to make them suitable for storing concentrated acids.