WHD UP 26-8, 2-Way (Coaxial) Ceiling Speaker System, 20 cm, Power rating: 25/35 W, Impedance: 8 Ohm, Frequency range: 50-18.000 Hz, Without transformer, Water-resistant cone, Outer diameter: 260 mm, Installation depth: 85 mm, Ceiling cutout: 230 mm, Weight: 1.6 kg, Colour: RAL 9016 White, Installation kit included for ceiling thickness of 1 to 20 mm @+@+*Note:*Very good low frequency range, very easy, tool-free mounting due to mounting ring, quantity 1 pair