Review on 💧 Gikfun Micro Submersible Mini Water Pump - Pack of 4pcs, DC 3V 5V, EK1893 by Brooke Johnson

For a small automation or school project, this is a great solution. Size charts and specifications are shown in the images or in the product description to give you a clear idea of whether they are useful for the intended use. I used mine to automate the watering of some potted plants with an Arduino. As noted in another review, the wires are very thin and depending on usage it is better to solder thicker ones (picture). Also, there is a gap between the wires and the case in the upper part, so water can get in. They are definitely NOT submersible as there is a space at the bottom above the outlet tube for water to enter. The seller also does not recommend long-term use. So if your application requires you find something else. All in all, these are great shoes for $3.25.