Part name:
-Upper Looper, #X77781001(X77781-001)
-Lower Looper, #X77774001(X77774-001)
Material: Steel
This high quality Steel Upper And Lower Looper replacement is exactly Compatible with/Replacement for Many Serger Sewing Machines, including (many not listed):
Compatible with Brother Brand Serger Machine Models:1034D, 1034DAV, 1134D, 1134DW, 2034D, 3034D, 4234D, 4234DT, 5234PRW, 925D, 929D, 935D, DZ1234, PL1500, PL2000
Compatible with Husqvarna Viking Brand Serger Machine Models:660CD & 680CD