Compatiblity: Suitable for GL315, GL337, GL350, GL650, GL651, GL652, GL653, GL655, GL656, GL660, GL670, GL680, GL687, GL5530, work with mowers.Efficient Cutting: Allows lines to and cushion impacts on hard surfaces, and the aerodynamic shape reduces drag for more efficient cuts. trimmers have better flexibility and durability.ABS Spool & Nylon Thread: The replacement spool is made of high quality raw material, the ABS spool is strong enough, and the nylon thread is flexible enough to not break easily, supporting fast cutting and service life.Appropriate Size: Cordless lawn mower spools are 0.065inch/1.65mm in diameter and fit perfectly into the cord hole. Spool length of 40ft/12.2m provides wider mowing.Easy to : Easy to install, quick-change cord trimmer replacement spools great flexibility, and changing spools relieves the work of manually winding spools.Colour:black+blueMaterial:Nylon, ABSSize:65 x 30mmPackage Contents:6 x String Trimmer Replacement Spool LineOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.