Use stainless-steel Booster for Water Heater if your water do not contain alkaline. Hot echoing quickly,integrating hot effect is good,high heating temperature. Temperature control is good,compliance in high efficiency. Durable and convenient to use,easy to install. Application range: suitable for all kinds of solar water heaters, air source heat pump heating, water heater, water tank, boiler, steam heating machine Type:DN25 Electric power:2000W Color:as shown Material: Stainless steel Package include: 2 x Stainless Steel Booster for Water Heater Warning: This item id used for heating the liquid,prohibited to dry burning or dehydration use. It should be placed in the air-dry place if not used for a long time. Place in a sealed plastic bags in a wet environment. It can be dried in 200 degree oven when the insulation is low Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.