Comparison : Item # 12,182, Brass 360 H02 Half Round 0.312x12"
Item # 12,183, Brass 360 H02 Half Round 0.312x24"
Item # 12,184, Brass 360 H02 Half Round 0.312x36"
Item # 12,185, Brass 360 H02 Half Round 0.312x48"
Item # 12,186, Brass 360 H02 Half Round 0.312x72"