Great question, very observant. No its not the hair system. What it actually is, Is that i just finished cutting in the unit. and all the hairs got caught up in the glue at the edge. Thats why I do not take good pictures. most people would have cleaned their lace before taking a picture, But i just snapped it anyway to show the cut in I gave. But yeah your right. There is a line, but its not lace or anything. Just small hairs that were cut from the buzzer getting stuck in the glue.