Ambassador mail bag self seal 320 x 440mm pk 200 opaque grey mail bag self seal 320 x 440mm pk 200 opaque grey pack of 200 pm 03200440 c these lightweight economical mail bags are made from tough durable polythene 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 label