Designed for PROAIM Airwave Vibration Isolator Arm Robust Spring Set from Proaim easily accommodates heavier camera set-ups from 15-30kg/33-66lb and allows achieving Smooth & Stable Moving Shots. Just change the Springs and You are Ready to Go! WHAT'S IN THE BOX - Proaim Airwave Heavy Duty Spring Set SPECIFICATIONS - Construction: Stainless Steel - Load Capacity: 15-30kg/33-66lb