Review (1/5): DO NOT BUY
You are paying for an upgrade "kit" to a 4Hi from the 3Hi..... They call it a kit and photo clearly shows proper lid. What you get is just a water chamber and nothing else. Amazon refunded my entire amount. There are reputable suppliers who can get you the "kit" with the water chamber and new lid..... The H3i lid does not work with the new H4i water chamber.