This multi functional mini Bunsen burner is made of brass, which is durable. In addition, the flame hardness and temperature can be changed by adjusting the sealing ring, Suitable for heating operations in laboratories, medicine, dentistry, handicrafts, hardware, etc. Specifications: Material: brass + metal Product size: 8.9*6.8 cm Weight: about 240 g Packing list: 1*Laboratory Burner Notes: Due to manual measurement, please allow 1-3 cm error. Due to differences in monitors and lighting effects, the color of the picture may be slightly different from the actual product.