saw chain raw material SAE8660 from USA SpecificationpackageG.W(kgs)Oregonmeasurement drive linkmini.3/8 .050white box6.591VS25*20*201634mini.3/ ... .050 56,300mm90,2,3,4.2mm, 3/8 .050 56 300mm90,3,4,5.6mm,3/8 .050 56 300mm90 ... 2times and adjust length 4times(total 4.2mm).3/8.050,56E,cut 90for wood of dia.300mm ... 90for wood of dia.300mm ,will be changed 3 drive links after re-mill blade 5times and adjust ...