18 Pack Lawn Mower Spools: Compatible with Black and Decker Lawn Mowers, 1.65mm A6481 A6485 Trimmer Spools (12 Trimmer Lines, 3 Caps, 3 Springs)Auto Feed Spools: Eventronic replacement spools compatible with Black and Decker lawn mowers are easy to use and automatically feed the mower via centrifugal force, reducing the hassle of manually sorting replacement spools while you work.Wear-Resistant: The trimmer line compatible with BLACK+DECKER weed eaters is made of an upgraded polyamide nylon material with a tensile strength of over 100 lbs, making it 30% more durable and lasts longer than other brands.Efficient Cutting: Black & Decker compatible trimmer spools are pliable and flexible, allowing the line to stretch and absorb the impact of hard surfaces and increase cutting efficiency by 50% so each spool cuts fewer weeds.Package Contents: Contains 12 Black and Decker compatible replacement spools, 3 spool caps, 3 springs.