These nets are to prevent birds from nesting under bridges, warehouse rafters, doors, under bridges or to catch falling items or debris from the sides of bridges or construction sites. SPI Nets use only high-quality netting with UV resistance against ultraviolet rays and weather guarded for years of service, black in color. The nets come with a durable polypropylene black braided rope border, giving you years of service without a break down. Ropes are laced through every mesh and use a fisherman’s knot every fifth tie, making the nets extremely strong. A 2” steel ring in every corner is used for ease of installing and more rings or snap hooks can be installed at your request. With over 16 years in the net business and over 34,000 square foot of fabrication space, we can custom build your net for the size you need.