They are larger than I expected and very well made. If you buy smaller quantities of rods in hard plastic flat packs they will still fit inside these tubes – you just snap off the top part of the OEM container. That way you can preserve the labeling on the rods and have different rods of the same class organized in one tube. Equally if you buy large quantities of rods, these are perfect for them as well. The rubber o-rings are sturdy and seem like they will last the life of the tube as well. Also, not seen in the picture for this – on the reverse side is a slot in the molded plastic for a standard sized label. So if you want to print labels and have a place where they will stick and stay stuck – there is a smooth (un-textured like the rest of the tube) blank area for just such purposes.