{"product_id":"ball-ring-25-mm-dia","title":"Ball \u0026 Ring 25 mm Dia","description":"A simple apparatus for demonstrating thermal expansion. The apparatus consists of a brass ball and ring. The cold ball passes through the ring but does not pass when heated. The brass ball is connected to the rod with a chain.","brand":"Supertek Science","offers":[{"title":"Default Title","offer_id":49978154778901,"sku":"SPSPH200205","price":23.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0857\/4897\/3845\/files\/PH20020-1.jpg?v=1781570881","url":"https:\/\/unitedsupplycorp.com\/products\/ball-ring-25-mm-dia","provider":"United Supply Corp.","version":"1.0","type":"link"}