791-181468B Bump Head Knob Assembly Replacement for Ryobi 725r (41AD725C034) Handheld Trimmer - Compatible with 181468 Bump Knob and Spring Assembly - Walmart.com
Amazon.com : HURI Carburetor for Ryan Ryobi 725R 767R 775R 705R 825R Trimmer : Patio, Lawn & Garden