uxcell 3W 4 Ohm Aluminum Housing Waterproof Internal Magnet Speaker 50mm Dia Product Name : Magnet Speaker;Power : 3W Resistance : 4 Ohm;Type : Internal Magnetic Shape : Round;Magnet Diameter : 18mm/ 0.71" Diameter : 50mm/ 2";Material : Aluminum, Plastic Weight : 17g;Package Content : 1 x Internal Magnet Speaker