Quick view Box of 10 blades for Frontier OS-27 and OS-31 Sawmills This is for a box of 10 blades. For information about the different blade types go up to the main menu and click on the 'About Blades' link. These blades are 12' long x 1-1/4" wide and fit the following models: $271.37 - $300.40 MSRP: Choose Options