Trimmer Head Cobra Max Universal Bump & Feed As Seen on TV. Easy to Install. No Disassembly Needed for Reloading. Cobra Max Patented Bump & Feed Technology. Load Line in Just Seconds. Universal Trimmer Head Fits 99% of Gas Trimmers. Built to Last Aerodynamic Design. Performance and Safety Tested. Line Size: 0.080 to 0.105 / Line Storage Capacity for .095 : 18 FT.