It does not require an additional gas cylinder - the wire has a flux filling it and forming a gas shield during welding
Ideally checked when welding outside - the wind does not blow gas and does not interrupt the job. It is used in construction, manufacturing tanks, agricultural equipment, used both in production and repair of devices.
Keep in mind! When working with self-joining wire, change the polarity in the welding machine - minus (-) should be on the welding holder, and plus (+) on weight.