It sounds like you're referring to a , Airbox , or Title Box (possibly components of a modular storage, tool organizer, or 3D printing accessory system) that has developed cracks, with "138" possibly being a model number, part count, or order reference.
It sounds like you're referring to a , Airbox , or Title Box (possibly components of a modular storage, tool organizer, or 3D printing accessory system) that has developed cracks, with "138" possibly being a model number, part count, or order reference.