SEACHOICE 21981 USCG-Approved Premium Marine Group 27 Series Hold-Down Battery Tray, Black Battery tray with with stainless steel hold down rods secures a single group 27 Battery Size: 11-5/16 inch x 6-13/16 inch x 1/2 inch Ideal for applications that do not require batteries to be completely encased. Meets U.S. Coast Guard regulations Not compatible with exide batteries