Vinyl SPLINE FOR WINDOW SCREEN – The screen retainer spline secures various screen types into window screen channels; use the roll to hold fiberglass and aluminum screen material to screen frames of both windows and doors BUILT TO LAST - Constructed of top-quality extruded vinyl, the gray window screen spline is round in shape, UV stabilized, and features a serrated exterior surface EASY INSTALLATION – Featuring a round hollow serrated core, the retainer spline is easy to install DIMENSIONS – The spline roller for window screens has an outside diameter of 0.185 (3/16) inch and measures 250 feet in length PRIME-LINE GRADE – We specialize in repair and replacement hardware products for your home; Prime-Line’s commitment to quality results in repairs that look as good as the initial install, making us the go-to solution for our loyal customers Top quality vinyl Round, serrated, hollow core Used to hold screen material to window and screen door frames