20" FULL CHISEL CHAIN FITS STIHL FARM-BOSS 3687-005-0081 PITCH .325 .050G 81DL PITCH: .325GAUGE: .050GDRIVE LINKS: 81FITS OREGON # 20BPX081GFITS STIHL 23RM3 81CAN ALSO FIT THE FOLLOWING SAWS IF YOUR BAR LENGTH=20" PITCH=.325 AND GAUGE=.050GFITS STIHL 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