You are Buying ParcelMax Very Strong A3 Size Small Parcel Corrugated Envelope Mailers. Manufactured in the United Kingdom Specification: External Dimensions: 349mm x 445mm Internal Dimensions: 340mm x 440mm x 6mm BOX WEIGHT: 137g APPX (This Product Qualifies As A Small Parcel Under Changes To Royal Mail Size Restrictions April 2013) These extremely strong envelope style box mailers are designed to help you save on postage costs. Standard C3 size envelopes for A3 sheets are now classed as Medium Parcels by Royal Mail — but these purposely designed mailers will keep your costs down to The Small Parcel Rate.
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