Our heavy duty Oyster bubble postal bags are manufactured from extra strong 110gsm paper & a tear & puncture resistant 65 micron bubble-lining giving added strength & protection against shocks for your products whilst in transit or in the post. The sides have welded seams to prevent bursting. These bubble envelopes classic Oyster paper finish have a smooth surface to write on & labels adhere easily. Because of the high slip polythene additive in the bubble layer products are inserted more quickly. These bubble envelopes are suitable awkward or heavier items. Fix with the peel & seal adhesive strip. Why not ask for a FREE sample? Call our packaging specialists on 0800 542 44 28 to order yours & get next day delivery. Sold in packs. Quantity Available in packs of 50 or 100 depending on the size of the mailer. Please see our discounts for 3 or more packs if you want to order in bulk. Size & shape options These Oyster heavy duty bubble mailers start at 120x 215mm & go up to 520x 660mm (internal opening x height). There are 10 sizes available. Materials Made from a 65 micron bubble liner with a 110gsm paper outer. Delivery information Delivered sealed in cardboard boxes.