The 1st range is from 2016 WP 50 piston with 4.01 reb bleed area. The 2nd range is from KYB 46 piston with 6.63 reb bleed area. The 3d range is from Showa 50 piston with 3.35 and 4.95 reb bleed area. Use the three charts to get a snapshot of how steep the damping curve is.