Material High Quality Steel.
Standard 25mm OD and 7mm ID (square center), 0.8/1.0mm (0.031/0.04 inch) Knurled groove, 7.5mm (0.3 inch) roller thickness.
Usage method It fits for many standard MIG/MAG welders w/ SSJ16 welding wire feeder machine.
Installation High precision and high strength,Quick and easy to install.
Note Other accessories are not included.