30 pound dual spring sold as each

• 30 lbs. of pressure at 1.050" installed height
• 40 lbs. of pressure at 0.970" installed height
• Coil bind at .710 outer and .640 inner spring
• Free height 1.380
• Inner spring .485 ID, .625 OD
• Outer spring .670 ID, .875 OD

These will work with dukar 212, ghost, non hemi predator steel valve retainers