The Dotz Permanent Cord Straps (35 Pack) are made of heavy-duty nylon, great for indoor or outdoor use. The Permanent Cord Straps bundle with one strap or simply, yet effectively group cables by a single color. Just insert strap end into lock to secure up to 1.875" diameter bundles and trim excess strap with scissors. Cut the strap to release the bundle. Each pack comes complete with 5 strap colors.