Nichrome wire diameter is 21 gauge/0.7mm, U-hook size is 0.7inchMade of high-temperature nickel-chromium wire, it does not deform when fired and can bear the weight of most hanging decorationsEasy to use. Bend and cut nichrome wire saves time. U-shaped hooks can be inserted directly into clay or molten glass with only one hook exposedU-shaped hooks are perfect for craft projects such as ceramic ornaments, glass projects, china and stoneware, and moreColour:silverMaterial:NichromeSize:about 18 x 1.7mmPackage Contents:300 x Nichrome Wire Jump RingsOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.