ITEM NAME:37/63 Tin Lead Line Soldering 1.0mm Rosin Core Solder Flux Welding Wire Reel Hot.Smooth welding / soldering surface. alloyed powder and resin paste flux. - RMA-223 is a high viscosity no-clean flux For PCB BGA SMD PGA PCA reworking. - 1X 50gram Soldering Wire. - No Silver or Tin.