The Century C-337 1" x 8-1/2" x .120" Extension Springs are built for heavy-duty lifting and closing. They are manufactured with 0.120" diameter wire for more strength when operating your garage door. The 1" outside diameter and 5.38" maximum deflection of these Century springs make them a good choice where greater strength is needed. The largest safe load for these items is 51.0 pounds. Century Spring C-337 8-1/2" Extension Springs: Extension spring Generally close wound helical with ends formed to permit their use in applications requiring resistance to pulling force Garage door opener springs measure 1" outside diameter 8-1/2" length 0.120" wire diameter 5.38" maximum deflection 51.0-pound maximum safe load

• Generally close wound helices with ends formed to permit their use in applications requiring resistance to pulling force.
• 1 Per Bag.

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