This is the V125 which is typically used with the 7/32 Ceramic Burner Head or the 3/16 Ceramic head. In the potter's world this mates with the 3" B-3 Ransome Head. I have used it with the larger steel burners I make like the large pipe warmer and the Garage Burner. It can be a toss up between this and the V100 for many applications. This has a slightly larger capacity to intrail air than the V100 but for many of the applications this is not an issue- I mean good enough is good enough. In reality the V100 and the V125 are very close in size and capacity. VENTURI_125