... ,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 pulled and ... pushed easily,even reaches 100 meters.In this picture, the core is made of ... enough.In this picture,the core is made of PE.This PE core is better than steel core.This core ...