lawn mower blade 1) body materials:65Mn,50# or SK5 and T8A etc 2) coated color : black 3) Teeth Number is 4T lawn mower blade1) body materials:65Mn,50# or SK5 and T8A etc2) coated color : black3) Teeth Number is 4T4) Size :Dia is 9" ,10" ,thickness is 1.4mm ,1.6mm .Packing showing lawn mower blade with 4T