This is screen retainer spline, constructed of top quality vinyl. Serrated, round, hollow core , Top quality vinyl Used to hold screen material to window and screen door frames. It is round, serrated, and has a hollow core for better installation. It is a top quality round, serrated vinyl with a hollow core.Black in color.25 ft.roll. Please refer to the line art drawing for dimensions and compare with your needs before purchasing This is a screen retainer spline designed to be use for securing various types of screen fabric into a window screen or screen door frame.0.155 in.(5/32 in.) in diameter. This is a screen retainer spline designed to be use for securing various types of screen fabric into a window screen or screen door frame. 0.2... This screen retainer spline is constructed of springy polyethylene foam and it is black in color. Foam screen spline is an excellent substitute for vinyl... Buy Prie-Line Products PL 16695 Zika Coplete Screen Frae Kit, 5/16 in. x 3/4 Screen Spline Sizes Prime-Line 0.225 In. X 500 Ft. Foam Screen Retainer Spline, Black P 8131 - The Home Depot Window Screen Spline