4 x 13.75 (duct opening size) 5 x 15 (overall size) Royal Linear Pattern - Black Finish - no screw holes - with lip - with beveled edge - 3/16" aluminum (RR134-98)
10 x 11.75 (duct opening size) 11 x 12.75 (overall size) Royal Linear Pattern - Black Finish - no screw holes - with lip - with beveled edge - 3/16" aluminum (RR220-99)
1.875 x 26.25 (duct opening size) 2.875 x 27.25 (overall size) Royal Linear Pattern - Black Finish - no screw holes - with lip - with beveled edge - 3/16" aluminumRR146-36)
1.375 x 26 (duct opening size) 2.375 x 27 (overall size) Royal Linear Pattern - Black Finish - no screw holes - with lip - with beveled edge - 3/16" aluminum (RR142-57)
11.25 x 12 (duct opening size) 12.25 x 13 (overall size) Imperial Pattern - Gray Finish - no screw holes - with lip - with beveled edge - 3/16" aluminum (RR274-99)
16 x 17 (duct opening size) 17 x 18 (overall size) Imperial Pattern - Gray Finish - no screw holes - with lip - with beveled edge - 3/16" aluminum (RR468-65)
19.25 x 13.5 (duct opening size) 20.25 x 14.5 (overall size) Imperial Pattern - Gray Finish - no screw holes - with lip - with beveled edge - 3/16" aluminum (RR481-37)
