I have some specs:

TbT springs, shot peened and twice compressed; ie, delivered at working length

Premium

29 coil 3.1mm wire 14.2-3mm ID 225mm OAL

31 coil 3.1mm wire 14.2-3mm ID 235mm OAL

34 coil 3.1mm wire 14.2-3mm ID 265mm OAL

Premium Magnum

27 coil 3.6mm wire 14.1-2mm ID 208mm OAL

31 coil 3.6mm wire 14.1-2mm ID 240mm OAL