GS Power's 12 inch Bar Grille for Subwoofer and Speaker in Matte Black Finish (1 pc) For 12" sub-woofer and speaker, Matte Black Finish, 4x Mount Screws Included Assembly Needed. Tighten the screws to fix bar grille shape Base Inner Spacing: 13-1/8". Measure your speaker prior to purchase to ensure fitment