Proven Part (3) Full Chisel Chain for 20In Bar Fits Stihl Ms260 Pro 3689-005-0081 .325" Pitch .063 Gauge 81DL, also comes with (1) Quart of Bar & Chain Chainsaw Oil Pitch: 0.325 Gauge: .063G Drive Links: 81 Fits Oregon # 22BPX081G Fits Stihl # 26RM3 81 Can also fit saws if your Bar Length=20" Pitch=0.325 and Gauge=.063G Fits Stihl Models: E140, HT70, HT75, 017, 018, 019T, 023L, MS140, MS160, MS193 C-E, MS150 TC-E, MSE140, MSE160, MSE180, MS192, MSE200, ME220, MS170, MS171, MS180, MS181, MS190, MS191T, MS192T Full Chisel Chain is for more experienced Chainsaw users,It has an Increased Risk of Kickback Injury