【Compatible with Multiple Craftsman weed eater Models 】The weedeater string is Compatible with Craftsman weed eater models: CMCST900, CMESTA900, CMESTE920, CMZST98020, CMCST915, CMCST900D1,CMEST913 Series, Compatible string trimmer line Model: CMZST065 & CMZST0653. Cap Model: CMZST120SC. 【Premium Meterial-PA6(Nylon)+30%GF(Glass Fiber)】 Adding just the right proportion of glass fiber to the nylon material dramatically increases the stiffness of the weedeater string, enabling it to maintain stable performance at high rotational speeds and not easily broken, effectively extending their life. This is a feature not found in other ABS plastic weed wacker string. 【Perfect Fit】 Eventronic weed wacker string works seamlessly with the automatic feed system thanks to the precision design and dimensional fit of the string trimmer line assembly. The protective cover is fitted with a snap-fastening structure to ensure that the weedeater string is securely locked in place. The perfect size significantly reduces the risk of trimmer line breakage and improves the stability of the machine by 40%, making it easy to handle all types of mowing tasks. 【Preloaded Trimmer Spools】 Pre-assembled weed eater string allow you to never have to spend a long time winding the line again, increasing the efficiency of mowing. The aerodynamic shape of the string trimmer line reduces drag for a more efficient cut and a smoother trimming experience, make weeding easiter. 【100LBS Tolerable Weight】 0.065-inch diameter/30-foot long weedeater line spool offer improved flexibility and durability, with a tensile strength of over 100 lbs, 40% stronger than other materials, and can withstand the high speeds of a lawn mower. CMZST0653 Weedeater String Compatible with Craftsman Weed Wacker, 0.065" 30Ft String Trimmer Line, Auto Feed Weed Eater String for Craftsman String Trimmer Edger(8Spool, 2Cap)