Wonwopn Tongue Mount Roller 4" W Black Rubber Adjustable Keel Roller Bracket Assembly for 2" Wide Trailer Tongue Frame

4" adjustable keel roller bracket assembly f/2" wide trailer tongue frame 4" offset bracket roller assembly (2" frame) Specs: Height: 11-1/2" Offset: 1" Diameter of bolt holes (each): 3/8" Includes: 4" black rubber roller,2 mounting bolts and galvanized brackets. These adjustable offset brackets mount on the trailer tongue frame with a 4 in black rubber roller.Length of the bracket is 11.5 in.The offset is 1 inch. Mounts with 3/8" diameter bolts (Included) and has a 5/8" diameter shaft for roller. Our galvanized steel bracket are hot-dipped in zinc,not cold galvanizing in zinc. This creates a coating that is typically 3 mil to 5 mil thick. This thick, all-around coating allows galvanized steel products to provide years of use without rusting or corroding.Cold galvanizing zinc layer is more thinner,so its durability and reliability are insufficient compared by hot dipped. So it is so easy to judge product made by hot-dipped or cold galvanizing in zinc.Normally products have bright and smooth in surface appearance, they are made by cold galvanizing.Products have rough and dull surface, no shine, they are made by hot-dipped in zinc.