Fretz BT-8 Brass Tube Forms 1-1/4" x 3/8"- Pack of 3

These 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.

Each 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.

Keep in mind: when making convex (domed) forms, doming will reduce the finished diameter. When making concave forms, the finished diameter will not be affected.

Features

• Seamless extruded brass tubing — no seam to compromise structural integrity during forming
• Malleable 70/30 brass alloy (70% copper, 30% zinc) for excellent workability
• Edges cleaned on a belt sander for a smooth, consistent starting surface
• Pre-annealed and tumble-finished — ready for immediate use at the bench
• Developed by Bill Fretz to meet repeated requests from professional jewelers and metalsmiths
• Sold in packs of 3 for efficient stocking and project planning

Specifications

Notes

• This product is subject to California Proposition 65 warnings regarding lead exposure.
• When 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.
• Concave forming does not affect the finished diameter.