The TS34 is brand new and includes a 4port probe holder, two extra John-guest fittings, and extra bulkheads. I bought this for a 70g setup that I eventually sold off and never set up. Please refer to their website for any specific info. As for this one, it’s never seen salt water. It looks brand new but it’s collecting dust and someone should use it. I’m located in Ventura County. Thanks!