Don't just keep your battery from sliding around; protect it from destructive corrosion too. Attwood marine's patented tray for 27 Series batteries meets ABYC standard e-10 and U.S. Coast guard requirements. Adjustable Crossbar locks contents securely in place. Attwood develops high value, engineered marine products to make life on the water easier to enjoy. Made to meet the demands of boat builders and distribution partners, our products are extensively tested on-site in our lab to provide worry-free boating under all conditions.