Please identify this packaging...

[stevedeer]

Please.

I get my prints from theprintspace.com and they arrive in a sturdy white envelope with polypropylene stiffeners and also in a bag that has clear cellophane type stuff one side and paper on the other, what's that called and where can I get supplies from?

Thanks in advance

Steve Deer

 

[stryvya]

Check your Post Office

 

[stevedeer]

…they pulled a face and shrugged! 'tis a specialist packaging thingy.