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Composite strip conductors for the two largest superconducting magnets yet to be built are described. The conductors consist of six bands of Nb‐48% Ti alloy buried in 2‐in.‐wide strips of copper. The conductors for the two magnets have, respectively, critical current capacities of 3000 and 5880 A. In addition, the quality of the bond between copper and superconductor is excellent, and the copper conductivity is high. Data are presented for these and other characteristics of the strip as manufactured. The strip conductors are anisotropic in their critical‐current behavior with respect to field orientation. The importance of this fact in designing magnets economically is pointed out. Performance results are given for a 24‐in. i.d. test coil containing a ton of strip. Many strip configurations are possible and can be easily produced Costs of strip of this type will be competitive with present materials.