{"product_id":"friction-apparatus","title":"Friction Apparatus","description":"This set includes a fiction block and a friction board, both made of smoothly finished pine wood. The friction block has a hook for the spring scale and two compartments for additional weights. It can be placed face-up or sideways. Students can vary the weight or area of contact to see their impact on the friction force. Comes with three 50g weights and a 100g spring scale. Size of board: 20 in. x 2 in. Size of block: 4 in. x 1-1\/2 in. x 1 in.","brand":"Supertek Science","offers":[{"title":"Default Title","offer_id":49978153271573,"sku":"SPSPH10576A","price":47.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0857\/4897\/3845\/files\/PH10576.jpg?v=1781570799","url":"https:\/\/unitedsupplycorp.com\/products\/friction-apparatus","provider":"United Supply Corp.","version":"1.0","type":"link"}