our package contains 40 welding rods, which meet all your needs by using our products; You can reasonably distribute our products on different appliances, which can be a good way to protect many places in the home that need them Thus, the welding fluid can deeply into the small brazing , so that the welded joint has higher strength and toughness, and reduce the brazing time;Before brazing, it is essential to thoroughly clean the brazing area and the of the brazing material, removing any grease, oxides, or other contaminants the solidus temperature of our hvac accessories measure 1193°F / 645°C, the liquidus temperature of our products measure 1472°F / 800°C; So the recommended joint space is 0.002" / 0.006", and the liquidity level is 3 our brazing rods are especially suitable for replacing split air conditioning copper pipe, household refrigerator, commercial refrigeration unit, refrigeration system accessories in the filter, press water, etc., to that the connection is strong and reliable, Manufacturer: Akfldms