TSUMURA Hard Nose Chainsaw Bar .063" D025 StihlTSUMURA Premium Hard Nose Bar One piece solid SKS 51 steel. Laser cut for precise fitment. Specially heat treated for superior hardness and longevity. Solid nose with hard faced radius. Length 20" or 24" Mount D025 Gauge . 063" 1. 6mm Mount Fits STIHL: 024, 026, 028, 029, 030, 031, 032, 034, 036, 038, 039, 040, 041, 042, 044, 045, 046, 048, 056, 064, 066, E15, E20, E220C, FARMBOSS, MS260, MS270, MS280, MS290, MS310, MS360, MS361, MS380, MS381, MS390,