The MB3 Blackout is a "blacked-out" large compact sling-style meter bag that comes with a removable sling-strap and removable carrying handle, so you can choose whether to use as a sling bag or carry it at your side. Capable of storing, transporting and protecting large meters. The main bay is designed for digital manifolds, meters up to 13.5" (34cm) tall and/or a few select hand tools. The back and inside pockets can store wireless probes. Removable backpack straps are sold separately to convert the MB3 Blackout into a Small, compact backpack.