ROD CHAIR #3 UNIT:INCH Diameter 0.12±0.001 2.84±0.02 3.11±0.02 2.95±0.02 2.8±0.02 3.09±0.02 12.4±0.02 4.92±0.02 R 1.38±0.04 CHEMICAL COMPOSITION(% ) C Si Mn 0.17~0.18 0.14~0.15 0.33~0.