1,Easily pull and push,even the length reach 100 meters; 2,High quanlity; 3,Iron core, steel core, PE core, ... PE core is better The core material can be iron, steel and PE,PE is the best;The cable can be ... best.In this picture, the core is made of iron.It is not good enough.In this picture,the core ... the best.In this picture,the steel core,the iron core and the PE core is put together. marine push pull ...