Compatibility is critical for international buyers. Confirm the internal dimensions can accommodate standard keg sizes such as Full-Size (Half Barrel), Pony Kegs, or Cornelius Kegs. Check the tap tower configuration (single, double, or triple tap) and ensure the coupler type (e.g., D-System for US beers, S-System for European imports) matches your target market. For B2B procurement, it is highly recommended to choose suppliers who offer customizable gas manifolds and interchangeable CO2 regulators.