Porch screening caps vinyl gray size in x 1-1/2 feet x 8 Made of durable outdoor grade vinyl. May use fiberglass or aluminum screening. Can be cut with utility shears or tin snips. Paintable. No mitering. Uv protected. Screen (not included) is rolled into place and cap snaps onto base (not included) and evenly tightens the screen without the use of staples, lattices, nails, or loose screens. When rescreening, the cap temporarily pops off. 11/2 inch caps are used to accommodate 2 inch x 2 inch framing and 31/2 inch caps are used to accommodate 4 inch x 4 inch framing.