Markal Silver Brazing Flux Paste - 22305 SEPTLS43422305 Powerful cleaning action reduces waste of expensive silver solders Packed in break-resistant plastic jars Meets Mil. Spec. MIL-F- 4883 6 Oz Jar Temperature range: 1000 Deg F to 1700 Deg F (538 Deg C to 927 Deg C)