{"product_id":"fretz-bt-8-brass-tube-forms-1-1-4-x-3-8-pack-3","title":"Fretz BT-8 Brass Tube Forms 1-1\/4\" x 3\/8\"- Pack of 3","description":"\u003cp\u003eThese brass tube forms from Fretz are purpose-built blanks for jewelers and metalsmiths who need a reliable starting point for forming bezels, rings, bangles, and other circular components. Designed by Bill Fretz in response to consistent demand from working jewelers, these pre-made forms save significant bench time by eliminating the need to cut and prep raw tubing.\u003c\/p\u003e\n\n\u003cp\u003eEach blank is cut from seamless extruded tubing composed of a malleable brass alloy — 70% copper and 30% zinc — making the material responsive to forming, doming, and annealing. After cutting, the edges are cleaned on a belt sander, the blanks are annealed, and then given a basic tumbled finish. The result is a clean, ready-to-use form that accepts further metalsmithing work with minimal prep.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eKeep in mind: when making convex (domed) forms, doming will reduce the finished diameter. When making concave forms, the finished diameter will not be affected.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSeamless extruded brass tubing — no seam to compromise structural integrity during forming\u003c\/li\u003e\n\u003cli\u003eMalleable 70\/30 brass alloy (70% copper, 30% zinc) for excellent workability\u003c\/li\u003e\n\u003cli\u003eEdges cleaned on a belt sander for a smooth, consistent starting surface\u003c\/li\u003e\n\u003cli\u003ePre-annealed and tumble-finished — ready for immediate use at the bench\u003c\/li\u003e\n\u003cli\u003eDeveloped by Bill Fretz to meet repeated requests from professional jewelers and metalsmiths\u003c\/li\u003e\n\u003cli\u003eSold in packs of 3 for efficient stocking and project planning\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eDiameter\u003c\/th\u003e\n\u003ctd\u003e1-1\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWidth\u003c\/th\u003e\n\u003ctd\u003e3\/8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGauge\u003c\/th\u003e\n\u003ctd\u003e20 gauge\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWall Thickness\u003c\/th\u003e\n\u003ctd\u003e0.81 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eBrass — 70% copper, 30% zinc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eConstruction\u003c\/th\u003e\n\u003ctd\u003eSeamless extruded tubing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eAnnealed, tumbled\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e3 pieces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThis product is subject to California Proposition 65 warnings regarding lead exposure.\u003c\/li\u003e\n\u003cli\u003eWhen doming to a convex form, expect the finished outer diameter to be smaller than the starting blank diameter. Plan accordingly when sizing for a specific finished dimension.\u003c\/li\u003e\n\u003cli\u003eConcave forming does not affect the finished diameter.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Fretz","offers":[{"title":"Default Title","offer_id":43583712624854,"sku":"143.338","price":7.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/fretz-bt-8-brass-tube-forms-1-14-x-38-pack-of-3-otto-frei-1.jpg?v=1719956533","url":"https:\/\/www.ottofrei.com\/ja\/products\/fretz-bt-8-brass-tube-forms-1-1-4-x-3-8-pack-3","provider":"Otto Frei","version":"1.0","type":"link"}