[en] Two superconducting solenoids have been designed and built for the Argonne Zero Gradient Synchrotron (ZGS) Polarized Proton Beam Facility. Each solenoid will have a central field of 8.0 T, an effective field length of about 1.75 m, and a cold clear bore of 11.5 cm. It will generate a spin-tipping integral field of about 14 T-m. The integral field homogeneity over the cold bore is +- 4%. The magnet stored energy is about 0.7 MJ. The stability simulation on a high current density intrinsic stable coil is described in detail. Comparisons are made between the simulation data and data obtained from the magnet performance tests. The cryostat design and construction are also presented