ROD CHAIR #2 UNIT:INCH Diameter 2.76±0.02 3.13±0.02 3.07±0.02 2.95±0.02 0.12±0.001 8.40±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.