Bottom, 1-1/4" H. aluminum screen frame to make replacement inserts that will operate in most main frames of triple track channels. Use with retainer spline model No. P7662 (Sku 261004). 72" length. No. PL14204 (Sku 269298); Mill, use with triple track top and sides model No. PL14201 (Sku 269204). No. PL14206 (Sku 261742); White, use with triple track top and sides model No. PL14203 (Sku 261736).