Writing placed on the labels of these tubes stays permanently, making them ideal for use in cell washers and water baths.

Fused-on labels provide ideal surface for marking. Eliminate many problems resulting from smeared or illegible identification of test samples. Size of label on 10 and 12 mm Ext.Ø tubes is 1.9×3.5 cm (³/₄×1³/₈"). Size of label on 13 and 16 mm Ext.Ø tubes is 2.5×5.1cm (1×2").