This is 1/4"and 1/6" black poly netting, typically used for excluding bats from structures and/or creating bat valves. It is stiffer that common window screening, although the 1/4" isn't as stiff as the 1/6" netting. It is not as easily chewed or ripped. It is easy to form against buildings and will hold its' character. It can easily be stapled or held in place with hercules putty on aluminum or vinyl sided structures.