Features 3 locking points which pull the lid into the gasket for a water tight seal. Constructed of injection molded polypropylene with a structural honeycomb lid for superior rigidity and strength. Non-slip textured surface. Can be mounted horizontally or vertically. Full length piano hinge for added strength and security. Interior opening is 11-1/8" x 7" and will accept group 24 series batteries. Fasteners: ten #10 FH (not included).