Description: 【Product Highlight】: Quartz Melting Crucibles are great for high temperature melting precious metals like gold, , brass, alloy, copper, scrap, jewelry, necklace, earring, bracelet, etc. 【Material】: Crucibles for Melting is made from quartz that ensures durability and long term use. 【Feature】: Quartz Melting bowls Set can provide for different sizes of jewelry pieces or materials. 【Multifunctional】: Ceramic Crucible Bowls are ideal for various applications including jewelry making, metal crafting, or any other process that requires the melting, casting and refining of precious metals. 【Widely Use】: Ceramic Quartz Crucible are widely applied to melt kinds of jewelries. Specification: Material: Quartz Size Chart: 100g:outer diameter 5.3cm/2.09inch, Inner diameter 4.6cm/1.81inch 150g:outer diameter 6.8cm/2.68inch, Inner diameter 5.8cm/2.28inch 250g:outer diameter 6.9cm/2.72inch, Inner diameter 6cm/2.36inch 500g:outer diameter 8.7cm/3.43inch, Inner diameter 7.7cm/3.03inch 400g:outer diameter 8cm/3.15inch, Inner diameter 7.3cm/2.87inch Length of two tweezers: 12.5cm/4.92inch, 12.2cm/4.80inch Package Includes: 5 Quartz Melting Crucibles 2 tweezers Note: 1. Please allow slightly error due to manual measurement. 2. Wish you a wonderful online shopping!