Made From 3/16 Aluminum Medium to Large Electronics Powder Coated Textured Black Made In USA Stainless Steel Hardware Included Universal Fixed Graph Mount This is a perfect fit for someone looking to bow mount a fish finder graph. Sold in three different sizes (4.2"-5.25"-6.25") Universal bolt pattern on top to fit top brands (Lowrance-Garmin-Hummingbird) electronics Easy to drill if you need to add more holes to top plate. Top plate is 12.75” x 3.25” Center hole is 1.3” Package Includes: Mount Bracket 4x #12 Stainless Screws