Extra Easy Silver Solder Paste .5 oz Syringe convenient #56, flux mixed in Extra Easy Silver Solder Paste .5 oz Syringe convenient #56 .5 ounce of paste solder with flux mixed in Contains fluorides that when heated give off fumes that may be poisonous or irritate the eyes, nose and throat. DO not breath fumes. Use only in well ventilated conditions. This solder has a flow temperature of 1205 Small projects can be soldered with a butane torch