Every cruising spares kit contains items, which in our experience, are lost, misplaceed or accidentally damaged during longer term cruising. Each kit includes:- Spare impellor, connector swivel and complete set of replacement seals etc.. Note:- A spares kit does not include a membrane, tow tube or stainless steel mesh filter unit, as these parts normally last a very long time if properly cared for. In particular, the tow tube and filter should last a lifetime. If you wish to go to Website:- www.watermakers.ws/FAQ.htm