Features: 1. Can effectively cultivate children's interest in learning 2. Can also be used for classroom teaching and easy to understand.
Note: - When there is too much steam , the engine will stop working. Please set aside the inside and outside needle to reduce friction. - Do not rotate the nut tightly, otherwise the glass will be broken. If the piston is cracked, you can be bond with glue. - The alcohol lamp wick could not touch the glass and get to the hole so tightly. - When pulling the piston, please do not force the front end, it is easy to break.
Package include: 1 x Stirling Engine 1 x Alcohol Burner 2 x Spare Heating Tube