The Poseidon Bubbler V2 fits the Sai perfectly to water-cool those thick hits! It replaces the top cap of the Sai and hangs off the side of your box mod. The Poseidon Bubbler V2 comes with a metal carb cap with magnetic dab tool for easy loading. The Poseidon Bubbler V2 can also be used with the EZ Sai if you add the Base Stand for stability. This product does NOT include the EZ Sai or Base Stand (pictured).