... .Color steel color or black color. Detailed Product DescriptionOKE clip knot (spring parts),zigzag spring,sinuous spring,coil spring, ... 18, loop height:48)(2) OKE clip knot (used with Zigzag springs) 1).high-tech plastic material 2).economical and circularable ... 3).obviously time-saving 4).fixed clip distances, no need ...