Boat Trailer Rubber Bow Guard Made from durable black rubber V-Block is for standard use 2" Block is: 2" Base Length x 2" W x 3" H x 4.5" Top Length 3" Block is: 3" Base Length x 3" W x 4" H x 6.5" Top Length 4" Block is: 4" Base Length x 4" W x 5" H x 8.5" Top Length