Adjustable-Flame Bunsen Burners

Straight tube burners allow flame to be adjusted from 3/4" to 12" (10 to 305 mm). Flame retainer, which is supplied with natural gas and LP models, prevents flame from lifting or extinguishing. Adjustable air and gas controls. Rustproof construction. Side-arm 13 mm OD. Models available for two types of gas supply.