Pyle PSTND14 Dual Heavy-Duty Steel Support Bookshelf / Monitor Speaker Stand Mounts (Pair) Includes 2 Speaker Stand Mounts, Includes All Necessary Hardware Heavy-Duty Steel Construction with Black Finish, Universal Size Fits Small and Larger Bookshelf Speakers Reinforced Column Support Tubes (May Be Sand-Loaded for Additional Safety and Performance) Adjustable / Detachable Floor Spikes for Additional Stability, Maximum Weight Capacity: 75 lbs. Top Plate: 7.0-Inch x 9.5-Inch, Base Plate: 8.3-Inch  11.3-Inch