The Bells and Whistles, Dash 2, Four Inch Milk Can Twin Element.This is a complete deluxe package. Just get your electrician to wire up the elements and controller and hook the supplied plumbing to your water supply and you will have one of the nicest units ever offered in a 4" configuration. The Bell's and Whistles comes complete with Milk Can, Your choice of combination of 2400 or 3600 watt low density elements, Element guards and clamps, drain valve, sight glass on boiler, fill port on boiler. Top of the line