On Flagpoles that are utilizing an 8'x12' flag arrangement or larger it is recommended that a shock spring and cable be used. The shock spring is constructed of zinc plated high carbon steel having an overall length of 5 1/2" with the coiled section measuring 4". The 9" long safety cable is constructed of 1/8" stainless steel aircraft cable with a stainless steel thimble attached at each end with 2 copper crimps.