Quartz and Ceramics Material, handle and clamp are Stainless steel.Size of Soldering Board is 5.3 x 3.7 x 4.9inch/13.5 x 9.3 x 12.5cm(L*W*H), Max width of Tongs is 12inch/31cm, Max width of clamp is 10inch/25cm. bowl size is 2.2 x 1.8 x 0.8 x 0.8 x 2.4inch/55 x 45 x 20 x 20 x 60mm(OD*ID*H*Bottom OD*W), 3.3 x 2.8 x 1.3 x 1.2 x 3.4inch/83 x 70 x 34 x 30 x 87mm(OD*ID*Height*Bottom OD*W)., Capacity: 100g/250g, Total 5 Pcs. Advantages: The melting ceramic crucible bowl is made of Ceramics with a purity 99%, It can withstand temperatures up to 1000-3000CIt has high density and will not be mixed with other item during the melting process. It is and impact-resistant. Better ability. Instructions: The crucible bowl features tapered sides and a pour spout for easy material removal. Application: The crucible bowl set is great for melting and casting metals, gold, silver, copper, brass, alloys, and other high-temperature alloys. NOTE:Heat the quartz ceramic bowl slowly and apply glaze before use. Specification Instructions Slowly heat the quartz ceramic bowl before use. NOTE It is recommended that the heating speed should not exceed 50 degrees Celsius per minute. Heating and cooling during the test process should be as slow as possible to extend the service life of the product. Material: Metal colour: As shown Package Contents: 1 set x Crucible Only 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.