material:20#,st52,25w,ck45 cold drawn and stress-relieved (BK+S) honed inside : roughness 0.2um~0.8um; roller forming:<0.4um MAIN SIZE OF HONED TUBE inch diameter ODIDLENGTHWEIGHT kg: 50,8038,101.5-2 56,0044,453.5-4 60.850.83.5-4 63,5050,804~5 76,2063,504~5 88,9076,205-5.8 101,6088,905~5.8 114.3101,605~5.8 127,00114,305~5.8 139.91275-5.8 1461275-5.8 164.13147.325~5.8 177.8152.405-5.8 172152,405~5 ...