Pressure-resistant pipes made of materials such as copper, yellow and aluminum injection, which are attached to the end of the hose used to send water to the fire and allow the water coming from the hoses to be delivered to the fire with more pressure by compressing the pressurized water, are called lances.

There are lances in various sizes and their mouth boxes are between 8 mm and 40 mm. Therefore, the rate of water to be sprayed on the fire depends on the diameter of the lance.