Quick Cable Battery Boxes Group 24/27/31. Vent holes allow gases to escape preventing dangerous hydrogen build up. Heavy-duty tie down strap kit included with each box. Features of Quick Cable 120173-010 Battery Boxes Group 24/27/31 Larger wider cable ports for easy cable access Vent holes allow gases to escape preventing dangerous hydrogen build up. Trilingual safety warning in English French Spanish molded into cover Heavy duty tie down strap kit included with each box Package Contents: Quick Cable 120173-010 Battery Boxes Group 24/27/31 Quick Cable 120173-010: Battery Boxes Group 24/27/31