This Is A 18" Professional Proven Part Brand Sprocket Nose Guide Bar That Is .325 Pitch, .050 Gauge And Uses A 68 Drive Link Chain. 

Fits Oregon 180TXLBA074, 95TXL068G, Mount SW,  A074.

This Guide Bar Works On Stihl Models Like The MS250, MS250C, MS250C-BE, MS251 MS251C-BE 

Includes .325 Pitch .050 Gauge 68 DL Chain 

IMPORTANT: Your Saw Must Be Equipped With A .325 Pitch Sprocket For This Bar To Work On Your Saw. Some Of These Models Were Quipped New With 3/8" Pitch Sprockets.