{"product_id":"sprue-bases-button-style-1-14-to-4in","title":"Sprue Bases - Button Style","description":"\u003cp\u003eButton style sprue bases — also commonly called donut style sprue bases — are designed to fit securely at the base of casting flasks, providing a centered opening through which wax sprues are fed prior to investing. These sprue bases feature a raised center opening (the \"button\") that varies in diameter depending on the flask size selected, with the smallest size offering a center opening of approximately 3\/8\". Eight sizes are available to accommodate flask diameters ranging from 1-1\/4\" up to 4\", making it easy to match the correct base to your existing casting flask inventory.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eButton style (donut style) design with a centered opening for sprue attachment\u003c\/li\u003e\n\u003cli\u003eAvailable in eight sizes to fit flask diameters from 1-1\/4\" to 4\"\u003c\/li\u003e\n\u003cli\u003eCenter opening starts at approximately 3\/8\" on the smallest size and increases with flask diameter\u003c\/li\u003e\n\u003cli\u003eDesigned for use with standard casting flasks in lost-wax casting workflows\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAvailable Options\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003ePart #\u003c\/th\u003e\n\u003cth\u003eFlask Diameter (Imperial)\u003c\/th\u003e\n\u003cth\u003eFlask Diameter (Metric)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e121.776\u003c\/td\u003e\n\u003ctd\u003e1-1\/4\"\u003c\/td\u003e\n\u003ctd\u003e30mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e121.777\u003c\/td\u003e\n\u003ctd\u003e1-3\/8\"\u003c\/td\u003e\n\u003ctd\u003e35mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e121.778\u003c\/td\u003e\n\u003ctd\u003e1-3\/4\"\u003c\/td\u003e\n\u003ctd\u003e45mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e121.779\u003c\/td\u003e\n\u003ctd\u003e2\"\u003c\/td\u003e\n\u003ctd\u003e50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e121.781\u003c\/td\u003e\n\u003ctd\u003e2-1\/2\"\u003c\/td\u003e\n\u003ctd\u003e65mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e121.782\u003c\/td\u003e\n\u003ctd\u003e3\"\u003c\/td\u003e\n\u003ctd\u003e75mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e121.783\u003c\/td\u003e\n\u003ctd\u003e3-1\/2\"\u003c\/td\u003e\n\u003ctd\u003e90mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e121.784\u003c\/td\u003e\n\u003ctd\u003e4\"\u003c\/td\u003e\n\u003ctd\u003e100mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"Otto Frei","offers":[{"title":"1-1\/4\" \/ 30mm","offer_id":47551721898198,"sku":"121.776","price":4.5,"currency_code":"USD","in_stock":false},{"title":"1-3\/8\" \/ 35mm","offer_id":47551721930966,"sku":"121.777","price":4.5,"currency_code":"USD","in_stock":true},{"title":"1-3\/4\" \/ 45mm","offer_id":47551721963734,"sku":"121.778","price":5.0,"currency_code":"USD","in_stock":true},{"title":"2\" \/ 50mm","offer_id":47551721996502,"sku":"121.779","price":5.0,"currency_code":"USD","in_stock":true},{"title":"2-1\/2\" \/ 65mm","offer_id":47551722029270,"sku":"121.781","price":5.0,"currency_code":"USD","in_stock":true},{"title":"3\" \/ 75mm","offer_id":47551722062038,"sku":"121.782","price":5.5,"currency_code":"USD","in_stock":true},{"title":"3-1\/2\" \/ 90mm","offer_id":47551722094806,"sku":"121.783","price":6.5,"currency_code":"USD","in_stock":true},{"title":"4\" \/ 100mm","offer_id":47551722127574,"sku":"121.784","price":7.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/sprue-bases-button-style-otto-frei.jpg?v=1719955521","url":"https:\/\/www.ottofrei.com\/products\/sprue-bases-button-style-1-14-to-4in","provider":"Otto Frei","version":"1.0","type":"link"}