The SA3-GRILLE-S-SS 3" Square Solid Surface Trim Kit is an ideal solution for any hard material surface, such as marble, wood, metal or any other material where ever the 63SA style In-Wall speaker is being installed. The 63SA style In-Wall speaker will integrate well with anThe SA3-GRILLE-S-SS 3" Square Solid Surface Trim Kit is an ideal solution for any hard material surface, such as marble, wood, metal or any other material where ever the 63SA style In-Wall speaker is being installed. The 63SA style In-Wall speaker will integrate well with any industry-standard lighting trim kits.y industry-standard lighting trim kits.