The Hobart 770170 is an Oxy/Acetylene welding tip for heavy duty use. The size of this #1 welding tip is 3/16" to 1/4". It works with the Hobart Oxy/Acetylene welders and cutters.
Hobart 770170 Oxy/Acetylene Type 4 Welding Tip
Accessory for Welders