FRVS- E is a pipe plug made of PE, in various colors, non-flame propagating, halogen-free. This pipe plug is used for closing pipes on construction sites and to protect empty pipes. Each package contains 5 labels. Color coding: NW 16 red, NW 20 green, NW 25 violet, NW 32 blue, NW 40 yellow, NW 50 green and NW 63 violet