The cylinders are unstable when put on a flat surface. They wobble when touched. The cylinder bases looked deformed and the graduated measuring vertical tubes are not centred on their bases.<br>In fact some of them were slanting; much resembling the leaning tower of Pisa.<br>You cannot take accurate measurements with an unbalanced cylinder especially one that does not stand upright or perpendicular to the surface onto which it is placed.<br>The cylinders therefore do not serve their purpose well due to their inferior quality, deformation and poor workmanship. Made in China and no ISO standard mentioned.<br>I've returned them for a refund and hopefully I will be reimbursed for the shipping charges.

Packaging was good, products seem to be good quality. The only issue is that the two smaller pipettes were missing. I'm thinking it was probably an honest mistake since everything else was included.

Packaging was secure, well made. Only complaint is situational. I'm usually working with condensed fuming nitric acid, and its very hard to keep the pipettes from dribbling as I'm moving acid to other beakers or vials.<br><br>Would be 100% if not for that. Hope this helps.