Prime-Line Aluminum .020 in. W x 146 in. L Screen Frame 1 pk (Pack of 48)Prime Line 3 4 inch x 3 8 inch . 020 Roll Formed Screen Frame is designed for use on wood windows and some sliding aluminum windows. Prime Line screen frames are manufactured with a slight camber (bow) that provides tension to the finished screen. This features helps eliminate wrinkles in the screen fabric. The screen frame accepts up to . 185 vinyl spline and uses both square cut and miter (angle) cut screen corners. Mill Finish, 146 inches long.