Comparison : Item # 21,160, Carbon Fiber 33 MSI Carbon Round Tube 0.196x0.0375x48"
Item # 21,161, Carbon Fiber 33 MSI Carbon Round Tube 0.21x0.039x48"
Item # 21,162, Carbon Fiber 33 MSI Carbon Round Tube 0.22x0.041x48"
Item # 21,163, Carbon Fiber 33 MSI Carbon Round Tube 0.24x0.045x48"
Item # 21,164, Carbon Fiber 33 MSI Carbon Round Tube 0.254x0.048x48"