Review on Bio Plas Assorted Polypropylene Microcentrifuge by Sam Anez

"Lids" not included, not sure what that part of the description means but "lids " are not. included in this purchase. I have five strong plastic racks and that's it. The quality is good and they are really strong and heavy so not easy to knock over. The 1.5ml tube fits 2/3 into the rack, and the inner surface of the holes is flat, so the 1.5ml tubes will wobble a little. They would be MUCH better if there was a smaller hole at the bottom of each tube hole to securely hold the tapered ends of the tube. I wouldn't use anything smaller than a 1.5mL tube as there is too much slop for the tubes to tip and wobble.