Tie Down Engineering Shock Absorbing Boat Guide 22Hull Sav'r boat guides are designed to absorb impact of the hull and protect the trailer's finish. Poly vinyl protector pads eliminate metal to metal contact and prevents rust. Shock dampener and wedge dampener can be configured for 0, 7 or 14 degree hull angles. All hardware included. Universal fit for 3" & 4" trailer frame size. Sold in pairs. Box : 1 pr. Height : 22"