Keepsafe envelopes extra strong polythene opaque dx w400xh430mm peel
Keepsafe envelopes extra strong polythene opaque dx w400xh430mm peel and seal ksv mo5 x 20 box 20 easy to write on surfaceaccepts handwriting stamps or frankingsaves on postage costssecure peel and seal closureweatherproof waterproof burst proof