Test tubes are universal cylindrical laboratory glassware with a round bottom that are used e.g. for chemical reactions, pretreatments or for storing small amounts of liquid.– Thick-walled and therefore mechanically very resistant – Available with beaded rim or straight rim – With round bottom – Fired-on, highly durable white ceramic – Test tubes are universal cylindrical laboratory glassware with a round bottom that are used e.g. for chemical reactions, pretreatments or for storing small amounts of liquid.– Thick-walled and therefore mechanically very resistant – Available with beaded rim or straight rim – With round bottom – Fired-on, highly durable white ceramic –