BCY 3D End Loop Serving is a small diameter material will fit snugly into cams/wheel tracks of your compound bow and covers areas on strings and cables needing protection from abrasion on your bow string. 100% Dyneema® or Spectra. Diameter 0.016" dia. 120 yard roll. Easy to use. When served tight white 3D serving allows the bow string colours and twists to show through the serving.