2-Pack Trimmer Mow Ball Assembly | Replacement Hex Center Bearing & Head for Walk-Behind String Mowers | 311011

["【Precise Fit & Replacement】Designed as exact replacement for part #311011, this mow ball head seamlessly integrates with your walk-behind string trimmer to restore optimal cutting performance and smooth operation.","【Enhanced Durability】Crafted from high-impact resistant plastic with UV protection, this hex-center assembly withstands tough terrain and weather conditions while maintaining structural integrity.","【Universal Compatibility】Perfectly compatible with major trimmer series including AF100001, FT1000001, T4X Pilot/Pulse, TR0-TR4 models (verify specific serial numbers for TR1/TR3/TR4 compatibility).","【Dual-Pack Convenience】Includes two complete assemblies with hexagonal center design for easy wrench-assisted installation - keep one as backup to ensure uninterrupted lawn maintenance.","【Performance Verified】The precision-engineered hexagonal bore ensures secure mounting and smooth rotation, significantly improving cutting efficiency on both flat surfaces and challenging slopes."]