CRL Screen Retainer Spline is a high quality, hollow core vinyl for repairing, re-screening or fabricating window, door, and patio screens. Bulk rolls are economical to use and easy to handle. Gray Spline blends well with aluminum or gray fiberglass screen wire and mill, gray, or white finish frame. Black Spline blends well with charcoal aluminum or fiberglass screen wire and bronze or beige finish frame.