The Full service pack allows 8-9 hours of operation. Includes 2 bottles of fuel, 4 bottles of chemical, 1 green brush, and 2 stainless steel brushes. Karcher Part # 8.639-871.0
The Fuel Only Option includes 2 of the Propane / Butane Mix bottes. Karcher Part# 8.638-579.0
Replacement solution is available in a smaller, 90ml bottle. This is ideal when you have an empty, full size bottle of solution. Just pour in the 90ml of concentrate and fill with water. Karcher Part# 8.641-480.0