Polk Audio Ultramarine Coaxial Speaker - 7.7" Black 7.7in. Features XKGlow LED light ring (Compatible with XKGlow Controller with App Support). This product is sold as a pack of two. Features of Polk Audio Ultramarine Coaxial Speaker - 7.7" Smoke gray housing and grille Air Suspension Design Cast Aluminum Basket High Temp Voice coil Insulated Tinsel Leads Package Contents: Polk Audio Ultramarine Coaxial Speaker - 7.7" Polk Audio UMS77BR: Ultramarine Coaxial Speaker - 7.7" Black 7.7in