10 pack of 50ml Test tubes

10 pack of 50ml test tubes. These are the same size test tubes as in Kit #1 and The Big One kit. They are nice a big so that little hands can open and close the lids easily. Volume markings are clearly visible in 5ml incriments. Strong and durable for all your experimental needs. They fit into the test tube rack that are supplied in Kit #1 and The Big One kit