GB Power-Tip Plus is a three piece spot welded laminated bar with built-in sprocket nose for faster cutting. It has more welds than competitors, giving it extra strength and longer life. GB Power-Tip Plus are economically priced suited to occasional light use pruning small trees or general light firewood cutting. 
Length 18 inch
Drive Link count 66
Pitch 3/8" 
Gauge .063"
Mount SN - D025
Model SN18-63LG
Fits Stihl models with 3/8" pitch drive sprocket fitted:
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, MS390, MS440, MS460, MS650, MS660, MSE220C