Protective Case Product Type Protective Case For Use With (1) 58 L (1)103 L (2) 17 (2) 29 L (2) 34 L Calibration Gas Cylinders Housing Material HDPE Blow Molded Plastic Inside Height 4.5 in Inside Length 18.5 in Inside Width 13.75 in Color Black Exterior Height 5.5 in Exterior Length 20 in Exterior Width 15 in Features Padded For Cylinder Volume 17 L Includes Foam Insert