ITEM NAME:1.2mm Bearing Steel Mig Welder Wire Feed Drive Roller Roll 30mm Diameter Description: - Welder wire feed drive roller roll parts. - High and precision and strength. - Durable design and exquisite workmanship. - Easy to install. Specification: - Material: bearing steel - Inner Diameter: 22mm/0.87inch - Outter Diameter: 30mm/1.2inch - Chickness: 10mm/0.4inch Package Included: 1 Piece Welder Wire Feed Drive Roller Note: Please allow 1-3mm errors due to manual measurement. Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same..Welder wire feed drive roller roll parts. 1 Piece Welder Wire Feed Drive Roller. - Material: bearing steel. - Easy to install.