Attwood Marine - Heavy-Duty All-Plastic Adjustable Battery Tray - 24 Series - 9097-5. All-plastic and heavy-duty, these battery trays use an adjustable cross bar and posts to allow for a universal fit of both short and tall battery styles.. Contain no metal parts to corrode and no webbing straps to fade Ergonomic nuts and bolts easily secure batteries WARNING: This product can expose you to chemicals that are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to P65Warnings.ca.gov.