60 PCS 50ml Flat Bottom Plastic Centrifuge Tubes, 27x115mm, Self Standing, No-Leak, Blue Screw Cap, Graduated Marks, bag pack

DO NOT BUY THESE. The lids will not screw on completely and if you attempt to shake them they will spill and leak. Not worth the money. You may think it is a deal for a steal, but that is not the case.