Finding the right postal supplies is essential if you are sending out large volumes of mail documents and unwieldy items need to be securely packaged to withstand the rigours of the postal system and supplies need to bought in bulk running out of envelopes at the end of the day is so annoying keep your items secure these c4 240x320mm envelopes from postsafe are made from very tough biodegradable polythene and are ideal for heavy and bulky items although made from extra