Klothread spring thread is the basic type of pdo absorbable thread which is used for skin firming and collagen generation. Compared to the screw thread, the klothread spring thread is strong screw-shaped mono type which thread is more tightly rolled up onthe needle which is perfectly retained even after the injection into the skin, it has significant effect on removing deep wrinkles and improving the concave areas of the face. Application areas : face Duration : 6~8months Expiration : 2years Packing : 100pcs/box (5pcs*20packs)