Self-Compensating
Used to obtain maximum energy absorption capacity. Impact velocity range is 0.5 to 16.5 ft./sec.
Adjustable
Adjustable from either front or rear. Impact velocity range is 0.5 to 16.5 ft./sec.
Low Velocity Adjustable
Adjustable from either front or rear. Impact velocity range is 0.6 to 1.5 ft./sec.