Vintage Original OEM Stihl Technical Information Bulletins cover Engineering changes on Guide Bars T.25.87,  engineering changes on model 084 saws T.26.87, engineering changes on model 064 saws T.27.87, engineering changes on HS 60 hedge trimmers series 4211 T.22.87, engineering changes on E 20 electric saws series 1207 T.23.87, engineering changers on model 070, 090 saws T.24.87, engineering changes on FS 10 Brushcutters series 4110 T.17.86, and engineering changes on model 08 saws series 1108 T.18.86 your buying the exact item shown will be shipped in priority mail flat rate envelope and are buying it as is no refunds or returns