🛠️ Secure Your Space with Style! Round, hollow core, and serrated for maximum grip. Simplifies the process of screen material attachment. Keep your screens firmly in place with top-quality vinyl. Crafted from premium materials for long-lasting use. Perfect for window and screen door frames. Black vinyl 25 ft length The Prime-Line P 7517 Screen Retainer Spline is a 25-foot roll of high-quality black vinyl designed to securely hold screen material to window and screen door frames. With a diameter of 0.130 inches and a serrated, round, hollow core, this spline ensures a durable and reliable fit for all your screening needs.