7' In. Stem Steel Roller Commercial Grade 10 Ball Bearings- Pair Shop By Gauge_18 Gauge 207 wire size and a

207 wire size and a 1 3/4 inch inside diameter

The 41C4220A Gear and Sprocket Assembly is the preferred way to "refurbish" your garage door opener as it quickly replaces all of the common wear parts in the opener drive system

The 1'' shaft makes installation a breeze

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7' In. Stem Steel Roller Commercial Grade 10 Ball Bearings- Pair Shop By Gauge_18 Gauge 207 wire size and a3' in. roller steel with ball bearings 7' in. stem Made of steel with a zinc plated finish Rated to open and close the garage at least 10,000 times Commercial quality, excellent for residential use