This trimming line reel is made from high-quality materials to ensure flexibility and durability with regular use. The included lawn mower replacement cover is constructed from high-grade materials to securely hold the line reel in place during mowing tasks. This product focuses on functionality, user safety, and performance. The self-feed trimming line reel simplifies trimming by automatically feeding the line through centrifugal force. This design eliminates the need to manually wind the line during operation, making tasks less labor-intensive and more time-efficient. Designed for high-performance cutting, its aerodynamic shape reduces drag for more efficient mowing and faster grass cutting. A high-quality solution for improved trimming efficiency. Installation and removal are quick and easy, making the trim line reels user-friendly. Each reel is pre-wound for convenience and can be replaced in seconds. Attach using the simple "snap" feature—no special tools or complicated instructions required, just your hands. Package includes: 4 replacement trimmer cord spools (196146-9/195858-1), 1 replacement cord spool cover (231352-0), and 1 spring. These replacement parts are compatible with Akkusense 18V DUA181Z, DUR181RF, DUR181, and MAKITA trimmers. A complete set designed to meet various lawn mowing needs. Material: nylon. Color: white and black. Package contents: 4 x spool, 1 x lid, 1 x spring. Only the items listed are included; other products are not part of this package. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.