The Zacuto Shoulder Pad without Rods is compatible with any standard-size 15mm rods. Once the rods are in the grooves, the pad can be mounted behind your baseplate or underneath your rod system.
You would mount it underneath your system -- using an optional Zacuto Q-Release -- to achieve counterbalance with DOF camera rigs, or -- using an optional Zacuto Zoffset -- to offset your rig and position your viewfinder more comfortably.
Shoulder Pad without Rods
Lifetime Warranty From Defects in Material and Workmanship