Specification Product Name Balance Type Hot Air Dual Cylinder Stirling Engine Generator Model Material Aluminum alloy brass quartz glassStatus Assembled Finished Product Flywheel Size 50 8mmSpeed 2000 rpmProduct Size 16 5 10 12 5cmProduct Weight 1000gPackage Size 23 x 13 x 16 cmPackage Weight 1043gFeatures Design Unlike ordinary Stirling engines it is a balanced double cylinder structure A small generator is installed which is heated by alcohol the motor runs stably at high speed and produces electricity that illuminates voltmeters LED or incandescent lamps Material Aluminum alloy brass quartz glass Mainly made of metal to prevent rust and fading The thickened quartz glass tube can be heated for a long time The piston can go for a long time is not easy to wear and is safer and more reliable to use Application It can be used as a scientific educational toy to study the principle of combustion engine and it can also be used as a cool desktop decoration Tips Simply add 95 alcohol to the alcohol bottle and light it on then press the wheel by hand it can drive at high speed The product is equipped with replacement glass tube and piston cylinder sockets You can replace it as you like without worrying about damage Package included 1 x Stirling Engine2 x Alcohol Lights1 x LED1 x Bulb2 x replacement glass tubes2 x Spare Flask Cylinder Socket1 x manual