No-Knot Netting is a heavy duty flame resistant polypropylene bird net used to block birds from entering unwanted areas. No-Knot Netting is made from a U.V. stabilized mesh and is available in various stock sizes and custom cuts. There are two mesh sizes to choose from to match the species of pest bird: 2A" mesh and A3/4A" mesh. No-Knot Bird Netting has the longest guarantee on the market - 10 years and has gone through ISO 1806 Protocol Mesh Testing.