SPACE SAVING DESIGN - marine battery tray is designed using the smallest possible dimensions to help with tight space issues RECESSED MOUNTING WELLS - uses low profile mounting wells and fasteners instead of bracket tabs to make installation in small spaces easier UNIVERSAL FIT - box fits series 27 boat, RV, and trolling motor batteries - poly strap features strong quick-release buckle to hold the battery firmly in place SAFE TO USE - resistant to gasoline, oil, acid and most chemicals to protect your engine compartment and electrical components NMMA CERTIFIED - meets all NMMA specifications to comply with industry safety, construction standards, and federal regulations