Difference internal and external thread

The Alphanumeric code corresponds with the position of the tube in the rack (e.g. A1). The code is therefore unique per rack. A 1D Barcode is the standard 'barcode' (type 128B). With a standard barcode the data that is stored can only be numerical (i.e. a series of numbers). The 2D Data-Matrix is an open 2D code and is laser-etched on the bottom of the tube. Both the 1D barcode and 2D Data-Matrix code can be customized.

Yes, several Micronic tubes are available in a tube trial pack. Please see an overview here...

This is a feature for Micronic Screw Cap tubes and accompanying racks. The ‘Twist-Lock’ feature prevents turning of the Screw Cap during (de)capping.

This is an option for Micronic internal thread tubes and it locks tubes into the wells in the rack to prevent sample loss from overturned racks.

An inner U-bottom maximizes the working volume of tubes. An inner V-bottom maximizes sample recovery and gives the lowest dead volume.