Compatible With:Ryobi P2009, RY15523A, RY15523AVNM .

Replace Part Number: 313318001 & 311759008

Auto-Feed System：Tap-to-Feed Dual Line Technology combats line breakage with pre-loaded 0.095" ultra-strong braided nylon

15 Seconds Replace: "No-Wrong-Way" Snap Lock

Industrial-grade Durability: A fiberglass - reinforced nylon shell, which is resistant to UV rays and corrosion from grass juice, and a high - strength plastic gear transmission (20,000 - time impact test) .

Total of 5 replacement bump feed heads