Amazon.com: (New) Carburetor Compatible with Ryobi 700r 410r 704r 720r 725r 750r 766r 767r 768R 775r 790r 740R + Many Other Models : Patio, Lawn & Garden
2-Pack 791-181468B Bump Head Knob Assembly Replacement for Ryobi 725r (41AD725B034) Handheld Trimmer - Compatible with 181468 Bump Knob and Spring Assembly - Walmart.com