Brand: Oregon Color: Gray Features: Trimmer head replacement fits brands like Echo, Stihl, RedMax, Troy-Bilt with adapter hardware included (Adaptors included: 7mm x 1.0 Left-hand, 8mm x 1.25 Left-hand, 10mm x 1.25 Left-hand). Trimmer line is high strength, square shaped for clean cuts, .105 inch thick, 564 feet long and withstands heavy duty use. Trimmer head holds 15 feet (4.6 meters) of .095-inch (2.4 mm) trimmer line compatible up to .105 inch thick lines. Magnum Gatorline trimmer line is compatible with most trimmer heads and fits curved straight shaft gas, electric and battery powered trimmers. Binding: Product Bundle Details: Oregon Trimmer Head Replacement, 4-1/2-inch Speed Feed, Fits Most Straight-Shaft Trimmers (55-265) This 2-Line Speed-Feed 4-1/2-inch Trimmer Head only takes 30 seconds or less to load. There is no disassembly required. Just slide line through the head until half of the amount to be added is on each side of the head, grasp the easy grip collar and wind line in. This rugged, semi-automatic head is designed for medium to heavy-duty applications and mounts to most straight shaft trimmers using 7 MM by 1.0 right hand, 8 MM by 1.25 left hand, and 10 MM by 125 left hand. Replaces: Rotary 13377; Shindaiwa 78890-21001; Stens 385-288; and more. This 2-Line Speed-Feed 4-1/2-inch Trimmer Head only takes 30 seconds or less to load. There is no disassembly required. Just slide line through the head until half of the amount to be added is on each side of the head, grasp the easy grip collar and wind line in. This rugged semi-automatic head is designed for medium to heavy-duty application. Mounts to most straight shaft trimmers using 7 Mil by 1.0 right hand male, 8 Mil by 1.25 left hand, and 10 Mil by 125 left hand. Oregon 22-805 Gatorline Heavy-Duty Professional Magnum 3-Pound Spool of .105-Inch-by-564-Feet Square String Trimmer Line Gray Magnum Gatorline Trimmer Line is ideal for professionals who need long-lasting, powerful tools to get the job done right. It quickly and easily cuts through low grass and grass-like weeds yet is durable enough to tackle sizable brush without breaking. This trimmer line is less likely to bond together in the trimmer head due to its weld-resistant outer layer. .105" diameter trimmer line is an ideal size for cutting heavier weeds. Magnum Gatorline is compatible with most trimmer head systems including fixed-line, semi and automatic bump-feed heads. Additionally, it fits most gas, electric and battery-powered curved and straight shaft string trimmers. Check your string trimmer manual for recommendations and to ensure that larger lines will work with your trimmer. Try our heavy-duty professional Magnum Gatorline. With a .105-inch gauge, this long lasting dual polymer trimmer line comes on a 3-pound spool. It has a square design and is reinforced with aramid fibers. Listing and template services provided by inkFrog