15ml test tubes with polyethylene quick closure screw caps. Leakproof, and suitable for centrifugation 4000xg. The design of the cap avoids any contamination due to drops of liquid on the inner surface. Transparent for easy viewing of contents. 16mm diameter x 100mm height. Graduated with 2 ml subdivisions from 2 ml to 12 ml. 100 per case. Made of clarified polypropylene.