Burner Bunsen Simple - GBR, Natural Gas-EIS-CH0089B offers a thoughtfully designed, durable resource for hands-on learning. Nickel plated burner tube with rotatable air regulator andÂÂ cylindricalÂÂ connector. For small dia. Burner tubes. Similar to CH0088B model but with a smaller burner tube diameter and lower overall height. Nickel plated burner tube with rotatable air regulator andÂÂ cylindricalÂÂ connector. Mounted on pressure diecasted base. Base dia. 80 mm. Burner Specifications: Tube Dia. - 11 mm, Height - 120 mm, Weight - 260 g.