This read-only object indicates how many meters can be chained in succession for a single rule, where the final meter in any chain is always an always-conform meter, so a value of 2 means the platform supports one real metering stage plus a fallback marking/action for traffic that fails it. An admin uses this to understand how sophisticated a multi-tier metering scheme (e.g. committed rate plus a fallback for excess traffic) can be on this platform. For example, an admin wanting to apply one action to in-profile traffic and a different, harsher action to out-of-profile traffic would need this depth to be at least 2 to chain two meters together.