D400
This is one of the world's most widely used water breakers.   With 400 streams of water through its aluminum head, it's a great way to get a large volume of water on a bonsai without washing away the surface.  It has a standard hose thread and works great with an H19 Shut-off and/or a G6926 quick connector.

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D400 Dram Water Breaker $ 5.95