Crook’s Radiometer This sphere powered by the sun The vanes in the Radiometer are alternately dark and light in color. When the light strikes these vanes it transfers heat to each one - but not at the same degree. The lighter vane reflects the rays and the darker vane absorbs the rays. The stronger the light, the more energy there is causing the vanes to spin faster. Terms and ConditionsWe ship Worldwide EVERY DAY! Our experienced International Shipping Team and shipping partners make it easy for you to shop and have your order delivered right to your door, no matter where you live. Approximate delivery time 5 - 10 days (Subject to Receiver Availability) Customs, Duties & Taxes:- Import duties, taxes and charges are not included in the item price or the shipping charges. These charges are the buyer's responsibility. Please check with your local customs authority to determine these additional costs prior to bidding or buying. These charges are normally collected by the delivering freight (shipping) company or when you pick the item up — please do not confuse them for additional shipping charges. Sometimes packages may be stopped and inspected by Customs officials at the border of your country. In our experience these inspections are quick and easy, but in some cases it may cause a delay in your package arriving. Usually these delays will be shown in your tracking information. If customs decides that your package cannot enter your country, it will be returned to us. In this case, you will be issued a full refund minus shipping and return shipping costs when we receive package back. FEEDBACKS:- If for some reason you are not satisfied with the purchase, please contact us as soon as possible to resolve the matter rather than leaving us a negative feedback. We will definitely satisfy you. Also please leave us positive feedback if you are satisfied with the purchase and we will do the same for you. RETURNS:- Return accepted within 30 days of purchase. Buyer pays for return shipping. You may return orders unused, in new condition, and in the original packaging. 100% refund or replacement will be issued as per your demand. Thank you for taking the time to view and consider our listing. [xsellxgallery3] My eBay items Digital Vernier Caliper 150mm 200MM screw gauge 0-25mm 25-50mmUS $46.00 Digestive System Anatomical Human ModelUS $210 Hope’s ApparatusUS $46.00 Educational Diffraction Grating 15x15x15 CmUS $39.00 Draining Rack 20 Pegs polypropyleneUS $101 Elbow Joint Size 12.5 x 12.5 x 32cm Joint Anatomy Human ElbowUS $62.00 Glass Prism Diy Reflection Prisms Equilateral Prism 50 X 50 MmUS $43.00 Heating mantle 1000ml Medical & Lab EquipmentUS $67.00 Double Target Lensometer For Eye GlassesUS $218 Digital Auto Potentiometer Medical & Lab EquipmentUS $117 Half Body CPR Training Model Male Anatomical Human ModelUS $218 Disarticulated Skeleton with Skull Anatomical Human ModelUS $179 Horse Shoe Magnet 3 inchUS $46.00 Slit lamp 2 step Haag street typeUS $900 Digital jar testing apparatus 2 spindle Lab EquipmentUS $390 Hot Air Oven 14X14X14 S.S. Chamber With Digital Temperature ControllerUS $468 Infant Obstruction Model Anatomical modelUS $237 Human Eye with Orbit Anatomy ModelUS $117 Battery Eliminator 2 AmpUS $73.00 Human Brain Model Anatomical ModelUS $85.00 Gold Leaf ElectroscopeUS $58.00 Electric Van De Graaf Generator Healthcare LabUS $148 Digital Voltmeter Black 4.5 x 3.5 x 3 cm Voltage measurementUS $54.00 Digital Viscometer Model Lab EquipmentUS $702