This screen retainer multi-spline pack includes three different diameters of top quality vinyl that are round in shape. Each feature hollow core centers and are serrated on their exterior surface. Each of these strands come black in color. Vinyl screen retainer spline like these are used to hold fiberglass and aluminum screen fabric in screen frames of windows and doors. The vinyl spline included in these packs include the following outside diameters:.120 (1/8 in.),.145 (9/64 in.) and.165 (5/32 in.) and each measure 250 ft. in length.