This wire mesh is woven from 304 stainless steel wire.The hole diameter of metal mesh is 1/5" (about 5mm), the wire diameter is 21 gauge (about 0.85mm). Opening area 75%.Since this stainless steel mesh is woven and then cut, the edge wire may fall off (please pay attention to this warning). The metal screen is a flat metal mesh, you receive it is unfolded, Suitable for many DIY projects, such as vent ,chicken wire mesh,fire pit screen ,pet screen roll ,rodent mesh , pet proof screen ,mouse proof dryer vent ,dryer vent screen BBQ grill,car grill,Cabinet net,Fireplace net,Drainage net,garden net