The bubbles can be as small as 6 millimeters (1/4 inch) in diameter, to as large as 26 millimeters (1 inch) or more, to provide added levels of shock absorption during transit.
Mullid võivad olla läbimõõduga 6 mm (1/4 tolli) kuni 26 mm (1 toll) või rohkem, et tagada transiidi ajal lisakoormuste liigne surve.