We have four type of the flux cored wire for copper to aluminum brazing. The flux cored wire XR-FC20A and XR-FC20AW (seamless) are silver contained. The flux cored wire XR-FC0215 and XR-FC0215W (seamless). And the working temperature of them are about 420-480. Also we have the separated material as brazing wire (XR-BW200, XR-BW15A Silver contain) and flux paste FS312C. And the XR-FC0215 also can be used for brazing Stainless steel to Aluminum. Middle temperature filler metal for joining aluminum to aluminum And we have brazing wire L36W and paste flux FB500P. Also we have the flux cored wire XR-FC36. These materials working temperature are about 490-510.