jms319 Anupdate after more than 4 years... More than 4 years ago, I bought this Stirling Engine (I submitted the above review with the yellow mug) and it still works great. Almost every day in the past years, I started up the engine, running on the hot water that was used for boiling potatos, vegetables, etc. Only I replaced the yellow coffee mug with a Double-Wall Insulated transparant Glass which keeps the heat of the water much longer hot than the yellow cup. You also can see what the motor is running on. The diameter of the top of that glass is 9 centimeters. The stirling motor runs normally for about two hours now, very fast in the beginning and while the water gets colder, slower and slower, until the motor finally stops. Even after four years, it's still a great gadget. Thanks again, Banggood for this very nice and well built Stirling Engine!

jms319 This set of rubber blades lasted only less than one year. I had to replace them already on 2020/01/18 for a new set because the rubber was broken. My previous set of blades came also from Banggood and lasted about two years (replaced the original Seat set on 2017/03/17). So, I reordered that set of blades which you find on https://www.banggood.com/Universal-28Inch-700mm-Car-Bus-Van-Truck-Rubber-Graphite-Wiper-Blade-p-961833.html?cur_warehouse=CN again instead of this set. That set is a little bit more expensive, but much easier to slide in/out of the frame because the rubber is thinner and my previous set lasted also longer than this set of blades.