The product is equipped with an air intake adjusting sealing door ring. By adjusting the sealing door ring, the flame hardness and temperature can be changed, which is suitable for various practical operation requirements. The product is made of yellow brass and is durable and does change color. Product Name: Portable Mini Bunsen Light Color: yellow Material: brass Package Contents: 1 Portable Bunsen burner. The item "20XHigh Temperature Brass Gas Turbo Torch Propane Weld Plumbing Portable" is in sale since Monday, August 17, 2020.This item is in the category "Home & Garden\Tools & Workshop Equipment\Power Tools\Welding & Soldering Tools". The seller is "directimports1899" and is located in Shenzhen. This item can be shipped worldwide.