1.6" Small Round Air Stones for Aquariums Oxygen Diffuser Fish Tank Air Bubbler for Hydroponics Aquariums Oxygen Stone 4pcs

What kind of specific plastics are used in this product?

Is it electric?

What kind of specific plastics are used in this product?

Does this cause the water to splash a lot? Looking for an air stone that won’t make a mess (current ones I have, bubbles pop and send water too far).