Poly-Planar Performance Box MA7500 Speakers. Low Magnetic Field two-way, bass reflex speakers. Will handle 100 watts/pair. Stainless steel gimble bracket included. Dimensions: 7"x5" Main cone size: 3 1/2". Features: * Coated internal wiring for long life * Stainless Steel Grille stands up to harsh marine effects * Compact bracket mount will fit almost anywhere.