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 oour 15% silver torch kits greatly improves the performance of brazing alloys with better wettability, higher strength and lower melting temperatures; 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; 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, water, etc., to that the connection is strong and reliable Color: As Shown Material: Copper Package Contents: 40*pcs Solder Phos Copper Brazing Alloys Only the above package content, other products are not included. Note: Light reflection 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.