Screens are vital to the performance of adhesive anchors in base materials that are hollow, or contain voids, such as hollow block and brick. Nylon Screens provide the economical advantage of a plastic screen while providing performance comparable to steel screens and better than competitive plastic screens. Nylon and Stainless Steel Screen tubes are used in hollow base material applications to contain adhesive around the anchor and prevent it from running into voids. ITW Redhead Epcon Õ Â screen tubes are designed to work with A7, C-6 and G5 adhesives in order to precisely control the amount of adhesive that passes through the mesh. This results in thorough coating and bonding of the rod to the screen tube and base material. Order screen tubes based upon rod diameter and adhesive type. The actual outside diameter of the screen tube is LARGER than the rod diameter