{"product_id":"twin-tone-bar-set","title":"Twin Tone Bar Set","description":"To demonstrate resonance, sympathetic vibrations, and beat phenomenon. The two precision-made bars are mounted on a single solid resonance cavity. The cavity has two chambers with one bar tuned to 440Hz. The other to 441Hz. Includes: hammer and instructions.\u003cbr\u003eGrades 6+","brand":"Supertek Science","offers":[{"title":"Default Title","offer_id":49975053877525,"sku":"SPSPH36152","price":64.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0857\/4897\/3845\/files\/PH36152-1.jpg?v=1781497201","url":"https:\/\/unitedsupplycorp.com\/products\/twin-tone-bar-set","provider":"United Supply Corp.","version":"1.0","type":"link"}