Features: OOTDTY Made from high-quality materials and designed for lasting performance. Easy to operate,compact and portable,making your experience more wonderful.Easy to carry to everywhere you want to go. Fill the for burner with your 95% (we recommend this and light it. Let the light burn the round ended cylinder for about 60-120 seconds, then give the wheel a gently push, it will It has a wide of application as, perfect gift for kids to improve children's eyes and curiosity, Physical/mechanical learning, teachers props on the class, birthday gift for friends, fami It's really interesting and imaginative toy. Art design,gift packaging design,low price,strong power,exquisite workmanship,safer. Specifications: Material: Metal Color: As picture shown Szie: Approx. 15x7cm/5.90x2.75in Weight: Approx.480g Package Includes: 1 Piece Stirling Engine Experiment Model 1 Piece Lamp (NOT INCLUDE 1 Piece Instruction Manual Only the above package content, other products are not included. Note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! _x000D_