This is replacement center section for boat trailer V-guide is a perfect replacement for your worn center section. The center section measures 12 ½” overall length, 2” wide with a inside measurement of 1 ¾”. Their have been a couple different versions of the bow guide made by different manufacturers. This center section is meant to be a replacement for a specific version. You will visually notice this product as a match for yours. The curved inner portion of this protective piece contours to the tubing that it mounts. It will not mount on the flat style of bow guide. You can re-mount this piece to your bow guide using stainless steel or galvanized self tapping or set screws.