Direct Info from Product Website : https://www.co2art.eu/products/manifold-block-for-pro-elite-series-v2-regulator

ITake your CO2 injection system to the next level with the CO2Art Pro Elite Series V2
Manifold Block.

Whether you're running multiple aquariums or diffusers, this modular add-on allows
for independent CO2 control across every outlet—without compromising performance,
safety, or precision.

Built to match the performance and aesthetic of the Pro-Elite Series V2 Regulator, this
manifold block connects directly to your existing setup. With included tools and a plug-
and-play design, installation is quick and frustration-free—you’ll be up and running in
minutes.

Newly Redesigned for Next-Generation Performance:
-Medical-Grade Metering Valve
Experience ultra-precise CO2 flow control for each outlet—perfect for setups with varying
injection needs.
-Bubble Counter with Built-in Check Valve
Monitor flow and protect your system with an integrated check valve to prevent water
backflow into your regulator.
-Tool-Included Quick Installation

Comes with everything needed to securely mount and seal the block—no extra parts or
purchases required.
Easily add multiple manifold blocks (up to 5+) to a single Pro-Elite regulator, giving you
the flexibility to grow with your setup.

ONLY WORKS WITH PRO-ELITE MODEL V2