1:heating ribbon includes Cr20Ni80,Cr15Ni60,Cr20Ni30,Cr20Ni35, Cr30Ni70, 0Cr25Al5, 0Cr23Al5,0Cr21Al6,0Cr21Al4,0Cr13Al4 2: ROHs 1:heating ribbon includes Cr20Ni80,Cr15Ni60,Cr20Ni30,Cr20Ni35, Cr30Ni70, 0Cr25Al5, 0Cr23Al5,0Cr21Al6,0Cr21Al4,0Cr15Al5,0Cr13Al42: ROHS, ISO90013:packing:carton and spool