Ambassador mail bag self seal 425 x 600mm pk 100 opaque grey mail bag self seal 425 x 600mm pk 100 opaque grey pack of 100 pm 04250060 c these lightweight economical mail bags have a tough polythene construction which resists both tears and punctures helping keep items secure in transit the bags feature a secure self seal closure which helps provide tamper evident security the opaque grey outer provides confidentiality and also features a smooth surface for writing stamping or labellin