Use this heavy-duty 48" x 1-7/8" anodized aluminum track to custom design your accessory system. The rail mounts to any surface - boat transoms, gunnels, vans, and truck beds. Cut the track to any length to fit your vehicle. One track holds up to five tank brackets (four, if end caps are installed). This track rail holds standard and adjustable tank brackets, rod holders, accessory mount, rope cleat, and drink holder.