【Comprehensive Replacement Kit】This set includes 3 spool (753-1156), 1 spool cap (791-153066B), and 1 spring (791-610317B) for MTD lawn mowers, ensuring a complete replacement solution. 【Wide Compatibility】Compatible with various brands including MTD, Ryobi, Troy-Bilt, YARD-MAN, Bolens, YardMachines, Cub Cadet, Craftsman, Homelite, Toro, Lawn Boy, John Deere, and McCulloch string trimmers. 【Durable Construction】The spring is made of metal for long-lasting performance, while the spool cap is constructed from sturdy plastic. 【Pre-Wound Spool】The spool comes pre-wound with 18 feet (5.5 meters) of 2.4mm bright orange triangular spiral line for easy installation and immediate use. 【Easy Replacement】Simple to install, allowing for quick and hassle-free maintenance of your grass trimmer. Specifications: Spring: Part number: 791-610317B Material: metal Product size: 30mm*20mm 791-610317B part replaces old part numbers: 791-BQ01642 and 791-610317 791-610317b inner reel spring compatible with MTD Ryobi Troy-Bilt YARD-MAN Bolens Yard Machines Cub Cadet Craftsman Homelite Toro Lawn Boy John Deere McCulloch String Trimme. Replace Ryobi 791-610317 B,610317R,610317;Lawn-Boy 610317; Snapper 4-2074, 7042074, 7042074YP; Homelite UP06526, 98848, Homelite 06713;  Fits Models: CS202, CC4165, CC4105, ST2020, CC2020, CC2025, CC2000. Spool cap: Part number: 791-153066B Material: Plastic Product size: 43*17mm Replaces part numbers: 791-153066 and 791-153066B 791-147153, 153066 Compatible with MTD 147153,153066,153068,49M-3066L- 034,49M3066K006,49M3066L034,49M3066P053,49M3066P500,49M3066P553,49M3066P953, 791-147153,791-153066 Compatible with Troy-Bilt string trimmer models: BR720, TB10CS, TB15CS, TB20CS, TB20DC, TB21EC, TB22EC, TB26TB, TB32EC, TB415CS, TB475SS, TB50, TB65SS, TB70SS, TB75SS, TB80EC, TB22, TB22EC, TB2EC, TB80EC and more Compatible with Bolens BL150 41CD150G765 Gas String Trimmer Spool: Part number: 753-1156 (RS753) Diameter: 2.4mm Bright Orange Triangular Spiral Length: 18FT / 5.5M Product size: 82*28mm Compatible with Replaces MTD MPN 791-180120 753-1223 753-1156 753-06707 49U1341L063. Fits Models: CS202, CC4165, ST2020, CC2020, CC2025, CC2000, CC4075,CC4025. 753-1156 dual line cartridge spool assy fits: Craftsman, MTD, Troybilt, Ace, Cub Cadet, Ryobi Pre-wound 0.095" 18ft trimmer line. Factory-wound for easy line replacement. Package included:3 x Spool1 x Spool Cap1 x Spring