The product is a set of four Vintage New Old Stock Monitor Roarer Burners, featuring the No. 405 model. The set also includes one used No. 405 burner along with one No. 408 silent burner. These Monitor roarer burners are suitable for camping stoves and outdoor cooking, making them a convenient and reliable option for those who enjoy hiking and other outdoor activities. With the Monitor brand known for quality, these burners are sure to be durable and efficient for all your camping needs. 3 are unopened 1 is open but not used, the other is used good condition. see pictures for more details. please see my other listing's for more vintage tools and ephemera.
eBay