Use this optional extension kit to make your Gateway or Center Gateway fit larger openings. For the Gateway, you can add one kit to fit openings up to 41 1/2'' wide. Only one kit can be added to the Gateway. For the Center Gateway, one extension kit is needed for openings 37 1/4'' - 42 3/4'' and two kits are needed for openings 42 5/8'' - 48 1/8''.
