This read-write DisplayString describes a list of frame sizes used in the FLPDU test frames, per its description. An administrator configures a range or set of sizes so the test covers how the service handles both small and large frames, since loss behavior can vary by frame size on a congested or rate-limited path. For example, an operator validating a service supporting jumbo frames would include larger sizes in satStreamFrameSizeList alongside standard 64 and 1518-byte sizes.