Return SP50 Price : $25.00 Quantity : **Add To Cart Supersonic SP50 Mounting Plate Fits: 3W 50i / 55i   SP50 Specifications Width 4.375" Height 3.50" Thickness 3/16" Mounting Hole Spacing Horizontal: 3.100" Vertical: 2.875" Weight (w/Hardware) 3.3 Oz     Specifications Subject To Change Without Notice