CHP-108: Pair of Heavy Duty Double Spring Platform Rocker Springs. Spring is 7 Gauge (8 Turns) and is made of steel. The base is 5-1/8"long by 3-1/2"wide. Sold by the Pair. One pair is enough for complete one rocker. Mountingwood screws are included. Please check to make sure that the screws are the appropriate lenght for use on your rocker and are not too long.