3/4" W. x 5/16" H., .020 gauge. For replacement screens in triple-track windows and aluminum screen doors. Screen retainer spline not included with aluminum screen frame, must order separately. Recommended screen spline size for use with aluminum screen .165 (11/64" diameter) and fiberglass screen .185 (3/16" diameter). Miter cut window frame corners order Model No. PL14294 (Sku 265242) or PL16030 (Sku 263547). Plastic square cut corners see sublist description for model No., must order separately.