The Acrulog PPM Low Range Carrying Case (Part # OLLRCASE) holds three Low Range PPB loggers for storage and transport purposes. It’s also possible to carry one Acrulog PPB, a cylinder of gas, dilution module, and regulator. The case is made of ultra high impact polypropylene and is waterproof and airtight. Outside dimensions are 19 1/8″ x 15 7/16″ x 7 9/16″.