NOS OMC Genuine Lawn-Boy C D series carburetor mixture screws. Oem part 677039. Part is from a long-time dealer's inventory. Parts may have light shelf wear and dusty from sitting on the shelf for years. All parts are NOS OEM parts unless otherwise noted. Parts may or may not come in original packaging. Thanks for looking, and be sure to check out my other listings for more NOS Briggs and Lawn-Boy parts. shipping includes tracking. Will combine to save on shipping.