Comparison : Item # 45,428, Steel A500 Pipe 0.75xSch40x12"
Item # 45,429, Steel A500 Pipe 0.75xSch40x24"
Item # 45,430, Steel A500 Pipe 0.75xSch40x36"
Item # 45,431, Steel A500 Pipe 0.75xSch40x48"
Item # 45,432, Steel A500 Pipe 0.75xSch40x72"