"These replacement WA0010 spools are compatible with following models: WG150, WG151, WG151.5, WG152, WG153, WG154, WG155, WG155.5, WG156, WG157, WG160, WG160.1, WG160.2, WG160.3, WG160.4, WG162, WG163, WG165, WG166, WG166.1, WG167, WG174, WG175, WG175.1, WG176, WG180.These Cordless grass trimmer spool line is 0.065 thick has over 100 lbsof tensile strength,Each spool comes pre-wound, so you can just pop it into your trimmer and get to work. Each spool contains 10 feet of string,provide a wider range of mowing.This grass trimmer edger line Made by ABS spool & durable polyamide nylon thread and flexible , So you don't worry about the spool lines life, For the same length lines, this WA0010 spool can work longer time than other string trimmers brands,Only suitable for tender weed grass,Tough and strong weeds please use blades to trim.The trimmer replacement spool utilizes centrifugal force and aerodynamics to reduce drag ,Achieve fast cutting and utilizes centrifugal force to feed the trimmer line as it is needed. The auto feed system replacement spool eases the tedious work of hand-winding spools.